This interlude features an unsent cover letter from Millie to a Master of Fine Arts (MFA) fiction program, found on an old laptop. In it, she discusses her semi-autobiographical novel in progress, The Weight of Dreams, which is inspired by her restrictive religious upbringing. She describes writing as both a personal escape and a professional dream, expressing hope that the program will help her develop her craft and find her authorial voice.

The sound of a typewriter awakens Sienna early in the morning. Unable to locate the source, she goes downstairs for coffee and overhears Jaxon giving Cate a pep talk about the competitive nature of publishing. They also discuss the legend of Fletch’s golden book. In the hall, Sienna finds a calm Priscilla studying a map of the island. Priscilla’s composure unnerves Sienna, who questions whether the romance author truly wants to win a thriller-writing contest. Priscilla advises her to focus on her own work.

In the kitchen, Kenzo makes espresso while Jaxon boasts about his fitness routine. Kenzo makes an obscure reference to “rock juice” from Jaxon’s sci-fi series, which excites Jaxon, but Kenzo won’t admit to having read Jaxon’s books. Kenzo then takes Sienna to the library, which is filled only with Fletch’s books, to show her a dollhouse replica of the mansion. He reveals its detailed interior, including a hidden door in the wall between Millie’s and Jaxon’s rooms, leading to attic stairs. Kenzo says that he found the actual door the previous night, but it was locked. Sienna realizes that it leads to an attic room that appears to be Fletch’s, as his red hat is hanging on the desk chair.

They hear Malcom calling for Sienna and return to the kitchen, where the other authors have gathered typewriter samples to investigate the prank note. Kenzo also provides a sample from Jaxon’s room. However, none of the samples match the faulty “G” from the note. The group then learns from Malcolm that Millie has already started writing, a fact that sends a wave of panic through Sienna.

This interlude is a short poem titled “Similarity,” written by a 15-year-old Oswald Jackson Jr. for a high-school literary journal. The poem reflects on the shared cosmic origin of humans and stars, conveying a sense of wonder and connection.

Sienna’s attempt to brainstorm with Malcolm quickly devolves into a bitter argument. Frustrated with his clichéd ideas and lack of preparation, she criticizes him, and he retaliates by calling her a “bitch.” The fight escalates, and Sienna declares that their writing partnership as Penn Stonely is over, along with their marriage. When she announces her intention to write her competition entry alone, Malcolm physically claims the typewriter and their designated yellow paper, asserting that they belong to their shared pseudonym, not to her.

Furious, Sienna grabs her notebook and storms out. She plans to go to the editor’s cottage to request a solo entry, but she’s sidetracked by the thought of Fletch’s secret attic room. She finds the hidden door in the hallway and uses a pen to pick the lock. She ascends to the room and finds it just as it appeared in the dollhouse model. She discovers a crumpled, unfinished letter from Fletch to Eleanor, confessing his struggle to write the novel’s ending.

Sienna notices that the letter’s “G”s are misaligned, confirming that it was used for the prank note. Her suspicion falls on Kenzo, who seems to be the only person who knew about the room. Exploring further, she finds a trapdoor leading down a ladder into a secret passage that opens directly into Millie’s bedroom. Before leaving Millie’s bedroom, she lifts the top sheet of Millie’s pale-blue paper and reads one excerpt of her writing, which is clearly not related to the Fletch manuscript. She’s nearly caught when Millie and Jaxon enter the hall but manages to escape back through the passage just in time.

This interlude contains an unfinished draft of an Edgar Awards acceptance speech from Malcolm’s computer. The speech begins with polite gratitude to Fletch and Sienna but quickly transforms into a bitter, resentful rant. He complains that he should have won years ago, before the award became what he considers a politically correct popularity contest.

Sienna walks to the editor’s cottage, determined to announce that she will be submitting her own ending. When no one answers her knock, she peeks through a window and sees Rufus reading a stack of pages. Realizing that another writer has already finished, Sienna panics and retreats, deciding it’s better to write an undeniably brilliant ending on her own than to ask for permission.

Back in the main house, Sienna finds Cate in the library, looking overwhelmed. Cate confesses that she feels immense pressure to succeed because her mother dreamed of being a famous author but failed to break through. Sienna advises her to pursue the dream for herself. During their conversation, Cate reveals that she signed with Eleanor after sending her very first query for her first manuscript, a fact that stuns a jealous Sienna. Offering a final piece of advice, Sienna expresses skepticism about Fletch’s golden book, saying that in publishing, when something sounds too good to be true, it usually is. Sienna decides to stay in the library to work and becomes absorbed in her work.

This interlude is a text-message exchange between Cate and a person named Ruby. Ruby complains that Cate has been distant and secretive, spending all her time on her devices. When Ruby jokingly asks if Cate is cheating on her, Cate denies it and cryptically promises that her intense work will be worth it in the end.

After hours of work, Sienna leaves the library to find the house unnervingly dark and silent. In the kitchen, she feels like she’s being watched and is momentarily terrified by what appears to be a figure in a doorway, only to realize that it’s a suit of armor. Just then, a drunk Millie appears and informs her that everyone is in the games room.

There, Sienna finds the other authors drinking. Malcolm, heavily intoxicated, publicly confronts Sienna, leading her to announce their separation to the group. As they argue, Priscilla intervenes. The tense gathering moves to the kitchen, where Sienna reveals that someone has already submitted their ending. After Jaxon jokes that it was him, Millie confesses that she was the one who finished, citing being a fast writer and her inability to sleep after the typewriter incident as her reasons.

Moments later, Millie accidentally spills a beer on Jaxon’s notebook. He accuses her of sabotage, and a fight nearly breaks out between him and Kenzo. Millie shouts for everyone to stop, and at that exact moment, the power goes out.

This interlude is a blog post written by Kenzo for a horror website. He humorously lists and analyzes four common horror tropes he loves: characters splitting up, the unkillable killer, the “final girl,” and the inevitable failure of technology, particularly power outages in isolated locations.

Plunged into darkness, the writers panic. They hear the front door creak open, and Jaxon charges toward the sound with a pool cue. The lights come back on just as he swings, revealing that Jaxon has struck Rufus, who’s now bleeding from a head wound. Kenzo arrives afterward, wiping his hands, and announces that he fixed the generator. Rufus, who claims that he came to check on them, seems unsteady, so the group insists he stay for a while.

Back in the games room, the authors awkwardly try to impress Rufus. The conversation turns to Sienna and Malcolm’s breakup, and Sienna formally asks Rufus if they can submit separate endings. While Millie and Malcolm argue against changing the rules, Priscilla supports the idea. Rufus agrees, declaring, “And so […] one becomes two” (155). The phrase triggers a sudden, powerful insight for Sienna; she now knows exactly how to end the book.

This interlude is a brief, loving inscription on the inside cover of a reading journal belonging to Priscilla. The note, from “Mom” and “Daddio,” encourages her passion for reading and writing, with her mother adding that she has already saved a space on the library shelves for Priscilla’s future books.

The other writers notice Sienna’s flash of inspiration. She quickly jots down her idea, and after Rufus leaves and the rest of the writers disperse, she remains in the kitchen, fleshing out her outline while drinking the strong tea that someone had brewed. When she finally returns to her room, Malcolm is passed out drunk. As she prepares to write, a wave of extreme dizziness and fatigue overcomes her, and she collapses onto the bed.

She awakens later, disoriented but still determined to write. To avoid waking Malcolm with the noisy typewriter, she decides to carry the heavy machine to the library. On the landing at the top of the stairs, she stumbles. As she catches her balance, a pair of hands shoves her forcefully from behind. Sienna tumbles down the stairs, hearing a snap as she falls. The typewriter crashes down after her, and the last thing she sees before losing consciousness is Julia Petrarch looking down from the stained-glass window on the landing.