A flashback or flash forward shows Christmas at Bella’s house, with a tidied-up Christmas table. As the camera pans out, it is apparent that something bad happened, as a part of the table is wrecked and there’s a mess on the floor. A figure stands at the entrance to Bella’s mysterious room.

The DIK mansion is fully decorated for Halloween, as people start arriving and the party gets going. The protagonist takes care of some last-minute problems that arise due to Tommy’s carelessness and then sits down for a beer with Derek, as they recall and discuss recent events. The story jumps back to the moment he stepped into the Burke’s house at the end of episode 8.

The protagonist is shocked to see the family photos on the counter and asks Maya and Josy if they knew that Sage is a Burke, to which Maya replies casually that Sage usually goes by “Sage Morgan Burke” but generally yes. Sage introduces the group to her family. Jade is surprised and Tybalt is angry to see the protagonist. The protagonist talks with Josy and makes sure her name is “Josephine Taylor” and that she doesn’t have any additional last names. Sage and Maya go to talk with Stephen as the protagonist excuses himself to the bathroom.

The talk with Stephen begins alright, and he asks Sage to leave the room to hear more from Maya. He is initially inclined to apply Maya to a scholarship but when she mentions the rumors about the HOT sorority providing free tuition, and that she ended up joining it anyway after being persuaded by Sage, Stephen turns around and tells her that his hands are tied and he can’t help her, as he deletes the filled application from his computer. In the bathroom, the protagonist talks with Neil on the phone and it is revealed that Neil didn’t tell Zoey the truth about why his old number was unreachable, as he tells Neil to give her his new number.

Sage comes into the bathroom angry and reveals that she was eavesdropping on the conversation between Stephen and Maya, and doesn’t understand why he suddenly turned around after also telling Sage that he can get Maya a scholarship. The protagonist tells her he is shocked by her never telling him she’s a Burke. Sage doesn’t understand why this matters so much and asks him what’s his family name, to which he replies by revealing that it’s Miller, as Sage says she will tell him about the “Morgan” surname on a different occasion.

Despite things not going according to plan, they all sit down for dinner with the Burke family as Tybalt is annoyed by their presence and particularly by Josy’s lack of taste in luxury food. The protagonist looks at Sage browsing social media on her phone and she reveals that she’s the Tyballs account that’s harassing Tybalt. They leave the house and are slightly disappointed with the outcome. In private, a worried Stephen calls a woman named Priscilla and tells her that they need to talk.

Derek and the protagonist conclude the Burke family flashback and then discuss Zoey, as the story jumps to the protagonist’s reunification with her back in their hometown. Zoey tries to act friendly and casually as the protagonist reveals that the ending of their relationship was devastating for him, that he was hurt by her not responding to his messages, and that he switched his number and wiped his phone so that he wouldn’t have to think about her anymore, revealing to her that Neil lied about the true reason behind him switching numbers. Zoey tells him that she left San Diego after realizing the importance of what she had back home, and the importance of their relationship to her, as they discuss him also thinking Zoey and Bret were a couple after seeing them on social media. Zoey asks the protagonist to restart their relationship as they cry together and discuss their now-improved ability to talk about feelings with each other. The protagonist tells Zoey about his time with the DIKs and the Halloween party he’s organizing and invites her to it.

Back in the present, Derek is shocked to hear that the protagonist invited his ex-girlfriend to the party, and goes to talk with her, as the protagonist goes to take care of the party starting.

The protagonist puts on his spartan warrior costume. Leon is dressed as Lily and is pissed at Jamie who was supposed to be dressed as Envy for their themed costume, but bailed out on him to do a magician costume with Dany who is now his girlfriend again. Becky is angry at Christie and Kylie for stealing her idea as all of them are dressed as nurses. The protagonist socializes with some of the dorm girls, including Tiffani and Gina. He then goes to sit at the Moose Lounge with Derek.

Conditional story - Moose Lounge

Sage The protagonist sits with Derek at the Moose Lounge and talks with him about getting closer to Sage as she texts him. He flashes back to him and Sage having sex as he is plagued by thoughts about her family, seeing Jade in his mind when he looks at Sage. Sage feels something is wrong and they stop and talk. Sage is initially enthusiastic to talk with the protagonist about her family and reveals that "Morgan" is the last name of her biological parents which she chose to keep, and that she and Tybalt were adopted from the same foster home because Jade and Stephen wanted both a boy and a girl. However, when the protagonist asks her about her relationship with her biological mother, Sage shuts down and ends the discussion.

Maya & Josy The protagonist sits with Derek at the Moose Lounge and talks with him wanting to commit to the relationship with Maya and Josy, as Derek gives him his blessing. He flashes back to him helping Maya and Josy pick costumes for the party.

Jill The protagonist sits with Derek at the Moose Lounge and talks with him about getting closer to Jill. He reveals that Jill is afraid of having unprotected sex and that to convince her to do it he had to go get an STD check. Later in the party, the protagonist flashes back to the STD check at the clinic, where he sees Dawe leaving after getting medication for the pubic lice that he caught from Arieth.

Isabella The protagonist sneaks Bella in through the window of his room. He flashes back to having a discussion about the party with Bella at her home, during which Bella reveals to him that Jill found out about them, and flashes back to what happened when she went to check up on her. In her room, Jill finally opens the door to Bella and reveals that she saw her and the protagonist having sex to the shock of Bella who apologizes and assures Jill that they were going to tell her the next day. Jill is nevertheless angry at Bella not just for taking the guy that Jill liked and Bella recommended to her, but for not being honest with her and hiding Bella's feelings to the protagonist from Jill for so long. Bella reveals that her relationship with Jill means so much to her that she will break up with the protagonist if that's what is required to save it. Back in the present, Isabella puts on her costume and she and the protagonist sit at the Moose Lounge with Derek who unknowingly reveals to Isabella how he hides his phone and earbuds from her in class.

Others The protagonist sits with Derek at the Moose Lounge as they are joined by an anonymous blue-eyed short woman in a ghoul costume. The protagonist talks with them about his dating life as he flashes back to texting with Nora, Nicole, Jade, Quinn, Lily, and Riona. The woman relates to him not being in a relationship and cheers for being lonesome. The conversation ends either with the protagonist telling her that he is dangerous or Derek calling him a teddy bear.

If Maya and Josy aren't pursued, the protagonist reveals to Derek that he still hasn't found the right time to break up with them and that he regrets not having done so because now he feels weird interacting with his love interest at the party as they are also present. If Jill isn't pursued, the protagonist flashes back to breaking up with her, as they are sitting in a park. Jill is shocked and replies that she loves him. If Isabella is his love interest, Jill asks why he picked Bella instead of her, and they end up kissing. They cry until she eventually leaves.

The party gets going as the HOTs arrive, as well as Jill with her friends Bianca, Matthew, and Olivia. In private, Bianca reveals to Jill that she’s attracted to the protagonist. Tommy asks the protagonist to guard over Josy during the party. Elena has set up a photo booth in the protagonist’s room and guests start going there to take pictures of their costumes. Derek is sad that Ashley isn’t at the party and tries to drown his sadness by hitting on girls, including Camila, but is unsuccessful in doing so because he is still thinking about Ashley.

When the protagonist asks Quinn how she managed to get the jocks not to attend the party, she flashes back to a discussion she had with Arieth at the HOT house. It is revealed that Arieth is pregnant, having relied on birth control pills she took from Dawe which he was using as steroids and, unknown to Arieth, were bought from Quinn (and didn’t work because Quinn sold him fake pills recently). Quinn then lets Arieth fulfill her wish of taking the jocks on a Halloween road trip to her hometown. During the road trip, which also has Ashley who wants to be with Anthony, Arieth reveals to Dawe that she’s pregnant with their child.

In the DIK theater room, Sage and Maya meet Jill who offers to try and provide legal help to Maya with her loan situation. Sage is initially very suspicious of Jill and eventually confronts Jill about not liking her because Jill is too close to Tybalt. Jill is disgusted at the assumption that she’s close to Tybalt and reveals to Sage what Tybalt has done to her. Sage is surprised and they make up as they discuss how much they both hate Tybalt.

Zoey and the protagonist go to the roof to talk and Zoey is introduced to Tommy’s cocky personality. Tommy is smoking with Riona and reveals that Quinn told him that their money issues are due to Riona smoking without paying. Knowing that she didn’t do that Riona is offended as she realizes that Quinn probably smoked without paying and blamed her for it. The protagonist finds Riona depressed on the bed in his room and cheers her up as she tells him what happened and that Quinn hurt her.

Conditional story - Hanging out during the party If Maya and Josy are not pursued, the protagonist is anxious about having to break up with them. However, if the protagonist was never a part of their relationship, Josy and the protagonist talk in private about what could have happened if they continued the relationship that started to form between them at the mini-mart, as Josy starts having second thoughts about the way things turned out. If Bella is not pursued, she arrives anyway after being persuaded to come by Jill, who also fetches her a costume.

Sage Sage remembers that she forgot the trophy for the costume contest in her room, and they go fetch it together. On the way back Sage is excited to hear about the times the protagonist assaulted or messed with Tybalt and she persuades him to prank Tybalt again. They fetch a pot of pumpkin pulp and pour it into his bed. Sage wants to also pour some in his suits but the protagonist chills her down and they get back to the party.

Maya & Josy The protagonist talks on the phone with Josy's father Pete who understands that he's Josy's boyfriend and is excited to invite him over to their house.

Jill The protagonist and Jill sit outside on the balcony and discuss Jill's family and the issues she has with her parents. She reveals that her father took Lana's life choices and eventual death very hard, blaming himself for letting her stray from the right path, and developed an alcohol addiction as a result.

Isabella Bella tries to make amends with Jill, who is unhappy to see her attending the party. Jill is angry that Bella wasn't honest with Jill about her feelings for the protagonist. Bella tells Jill that it was hard for her to come to terms with having feelings for him at all, and that's why she couldn't bring herself to confess them to Jill, as Jill is unsatisfied and tells Bella to give her some space if she wants their relationship to be able to heal.

Others The player hangs out with Camila. Later, the player attends the CUM-petition with the girls from the Pink Rose.

Josy is being harassed by Oscar, who mocks her social media profile, and the protagonist lets Tommy know of this as Tommy goes to find Oscar. The preps decide that their Halloween party is boring and that they are going to try to crash the DIK’s party, with Gordon reminiscing on Beth which he met at the dorm party. Rusty gets rejected by Micha who reveals that she’s decided to get back with her ex-boyfriend. Bianca can’t find Matthew. Sage and Maya discuss Maya officially rejoining the HOTs as Sage reveals that Becky already told her that Maya decided to join after Maya told Becky about that at the dorm party. Sage encounters Isabella in her costume and immediately recognizes her, having worked so much with her recently. She persuades Isabella to come play truth or drink with her, Maya, and Josy, who are now also in on the secret that Bella is in the party. The protagonist joins them for a few rounds but when they start asking him questions about Zoey, the power suddenly shuts down. During the outage, Becky falls into a tub of fake blood. The protagonist makes his way to the fuse box and turns the power back on. On his way there next to the wall with the DIK photos that Tommy hanged, there’s a flash of light and footsteps are heard.

The narrator comments in hindsight that although trouble was brewing all night, it was at this point that things started getting very bad. The girls from the Pink Rose arrive, as well as someone with a plague doctor mask. A topless Tiffani is shocked to see the new arrivals. Heather is with Nick in his room as she is crying and Nick consoles her. Matthew and Olivia are making out. Quinn slices the strap of Sally’s top. The preps slip into the party and Gordon sees Beth making out with someone and leaves in anger. It is revealed that the goth girl Christian made out with at the dorm party is Avery, the girl in the scarecrow costume. The plague doctor finds Quinn inside and reveals himself to be Vinny, as it is also revealed that he and Quinn used to be in a relationship. Quinn is unhappy to see him at the party and reminds him that they agreed that B&R is Quinn’s territory, as Vinny claims that Quinn is the one violating their agreement by selling to The Pink Rose. Lily overhears the discussion and rushes to Quinn’s aid, arguing that they stopped buying from him because they’re quitting and not because of Quinn.

Becky steals Jacob’s DIK jacket to replace her soaked clothes. The protagonist walks in on Matthew making out with Olivia, who warns the protagonist to not tell anyone what he saw. Zoey is sitting in the basement drinking something that Tommy made her. Heather is angry at not finding Tommy and, realizing that he’s cheating on her again, decides to also cheat on him in return, and tries to have sex with the protagonist. Riona thanks the protagonist for cheering her up and they end up discussing relationships, as Riona initially claims that she doesn’t want one but gradually becomes more interested in a relationship and in the protagonist. When the protagonist wears Tara’s ghost costume, he is encountered by Avery who thinks he’s Tara and tells him that they have something good, to his confusion. Tara reveals that Oscar is her boyfriend.

Rusty is sitting on the roof drunk and depressed as the protagonist joins him. He reveals what happened with Micha. Rusty applauds the protagonist for organizing the party and for doing so much even though he just joined the DIKs. Rusty also reveals that his plan B for the windows was to sell his sports car, saying that he loves the DIKs much more than he loves his car, and allows the protagonist to use it if he wants in the future.

The CUM-petition happens in private in the basement, with the loser having embarrassing photos of him taken and posted on the DIK wall. Quinn barges into Tommy’s room while he’s cheating on Heather with Christie and after kicking Christie out she lets him know that Vinny is in the party.

Sage, Quinn, and the protagonist pick out the best costumes and announce the winner of the costume contest, who receives the penis-shaped trophy that Sage made. Vinny checks out the new photos on the DIK wall and then tries to open the safe with the laptop, but is surprised when the code he uses does not work.

Dany leaves the party due to the presence of the strippers and topless Tiffani. Jamie goes to his room and sees the package from Leon with his Envy costume. He puts it on and Leon and him make up.

Riona and Camila leave together back to the HOT house. The protagonist encounters a drunk Elena in the bathroom, who reveals that the reason she and John Boy are naked out in the open on so many occasions is that John Boy gets turned on by people checking her out. Zoey leaves to catch the last train and looks back at the protagonist as she walks to the door.

In his room, the protagonist encounters a hostile Vinny, who is unhappy with how tidy his old room is and makes a mess in it. They fight and Vinny brandishes his gun, warning the protagonist to back off and calling him a submissive dog as Tommy comes around and asks Vinny to leave. Tommy lies to the now-shaking protagonist that the gun is just a prop and reveals to him that Vinny was here because he bought some drugs from him, asking him not to call the police. The protagonist organizes the mess Vinny made in his room as Tommy goes up the roof to talk with Quinn.

Quinn flashes back to another childhood memory in the drug den with her father Rox, who teaches her the basics of chess. Rox tells Quinn to never trust anyone except for him and to closely monitor every person she’s relying on, even Buddy. Rox then tells her that he’s going to show her what’s in his safe, but that she has to keep it secret.

Back in the present, Tommy tells her what happened in the protagonist’s room and Quinn is shocked at the gravity of the situation. Tommy takes the blame for the events on himself, having bought from Vinny because of the petty argument with Quinn, as Quinn interrupts and takes the blame on herself, apologizing for the events of the Hell Week party and revealing that she wanted to tell him she’s sorry before but couldn’t bring herself to do it because she feared showing weakness. Tommy agrees to stop buying from Vinny as they conclude that Vinny probably knows Quinn is now selling to The Pink Rose.

The party is close to ending and the protagonist says goodbye to the last people as they are leaving. Sally is stuck in the bathroom with no clothes after Quinn sliced the straps of her shirt, and asks the protagonist to bring her some.

Conditional story - Ending the night If Maya and Josy aren't pursued, the protagonist breaks up with them, to which Josy reacts very badly as she runs away crying. If the protagonist has broken up with Jill, she is shown in her room looking at the photo of the protagonist from their date, titled "Are you my destiny?" as she cuts it in half. If the protagonist has chosen to be with Isabella, she looks at the photo but doesn't cut it.

Sage The protagonist ends the night with Sage in his room. As they fall asleep, he is still plagued by thoughts about Jade and whether he should tell Sage about it. The next morning, Sage wakes up knowing about the "Walk of Shame". She proudly walks out of the room and mocks the DIKs as they are singing, revealing to them that she's in a relationship with the protagonist and that they are going to see her exiting his room a lot.

Maya & Josy The protagonist ends the night with Maya & Josy in his room. The protagonist wants to talk with them about their families to get to know them better, but when asking Maya about her mother, she shuts down and becomes sad and angry. The next morning, Maya walks out of the room not knowing about the "Walk of Shame". Josy suddenly remembers it and runs out naked to stop Maya but it is too late, as both of them are seen by the DIKs, who begin singing but then stop as Tommy is shocked at the sight of Josy.

Jill The protagonist ends the night with Jill in his room. He tells her about having seen Matthew and Olivia, as Jill shudders at the thought of how bad it's going to be for Bianca to find out. The next morning, he warns her about the "Walk of Shame". He walks out of his room first and asks the DIKs on the balcony to spare her the embarrassment as she is his girlfriend and not a one-night stand. The DIKs agree and Jill comes out, to the shock of Rusty.

Isabella The protagonist ends the night with Bella in his room. As they fall asleep, they are being watched through the window. The next morning, knowing about the "Walk of Shame", Bella decides to exit through the window. They kiss goodbye but are seen by Nick who happened to be outside taking a piss. Nick reveals that he's there as the protagonist and Bella are in shock.

Others Quinn asks the protagonist to accompany her downtown next week, unknowingly to him, to be her bodyguard when she visits the drug den. The protagonist can either end the night at the HOT house with Sarah and Melanie or Quinn, at Nicole's house with her and Lily, or in his bed which is occupied by Gina, Tara, and Tiffani. If he slept with Lily, Lily warns the protagonist not to fall in love with her. If he sleeps with Quinn, he sees a text message from Buddy on her phone asking her to meet him at the den and bring the goods.

As Derek wakes up in his room, he notices a flashing light on the ceiling. He pulls it out to discover it’s a hidden camera.