Cait wakes from an attempted nap when Augustus reports that a raccoon got into the garbage. Cait directs Augustus, James, and Finn to clean up the scattered trash. Augustus finds a positive pregnancy test in the garbage. Cait takes it from him and assumes that it belongs to Alice, though she briefly wonders if it could be Maggie’s.

Later, Cait tries calling Luke, but the line is disconnected. While looking at family photos, she focuses on one of Topher and is reminded of the time when he showed up drunk at her apartment the night before her bar exam. Topher claimed to be in town for Alice’s wedding, which was a week away, though he had not been in touch with Alice. When Cait told him that she was studying for the bar exam, he belittled her career choice. Cait agreed to let Topher stay the night and went to get an air mattress from the basement, but he passed out and locked her out all night. At dawn, he opened the door, apologetic. Enraged, Cait threw him out, accusing him of constantly trying to “kill [him]self” by taking up reckless jobs and hurting their mother. These words, she reflects in the present, have settled within her “like rot.” She admits to herself that she judges herself more than she judges her siblings, both for the harsh words she said to Topher and the circumstances around Daniel’s death.

Alice helps her mother choose an outfit for Thanksgiving dinner, acknowledging that Luke’s visit will be difficult. She finds a worn shoebox tied with a ribbon in Nora’s closet, but Nora sharply tells her to put it back, her hands shaking. When Alice asks what is inside, Nora reveals that the box contains condolence cards sent after Topher’s death. The box torments her daily, but she cannot bring herself to move it.

Alice says that she can’t believe Mrs. Larkin never sent a card after Topher died. Nora reveals that Mrs. Larkin did send one almost a year later, but she never read it. Nora tells Alice that now that she knows about the box, she can do what she wants with it. Alice is left with this new burden as her mother changes the subject.

Maggie is restless because she still has not received a text from Sarah. In the kitchen, her father dresses Poppy for the snow. When Maggie tries to discuss Luke with Cait, she rebuffs her, too tired to talk. Maggie then goes outside, where she finds shotgun shells in her father’s coat pocket. Nora shares a memory of Topher playing in the snow to escape Maggie’s crying as a baby. When Maggie asks what Nora thinks of Isabel, her mother gives a vague answer and changes the subject to blue jays. Frustrated, Maggie returns inside.

Later, Maggie and Isabel are joined by Poppy as they make bagels. When Poppy tells Isabel that she doesn’t color properly, Isabel replies that there’s no “proper” way to create art, soothing Poppy. Maggie kisses Isabel’s hand but is overcome with the memory of kissing Sarah and fears losing Isabel.

Alice assigns Maggie to clean the basement. There, Maggie finds her father giving his valuable antique Lionel trains to Augustus and James, which shocks her since he never let his own children touch them. The memory triggers another: Topher giving her his Jeep shortly before he died, which she now recognizes as a sign that he was preparing for death. Maggie takes her favorite green caboose and pockets it. Her phone buzzes; she knows it is Sarah.

Overwhelmed with Thanksgiving preparation and the dilemma about her pregnancy, Alice seeks refuge in the sunroom, where she finds Isabel with a tarot deck. Isabel compliments the room, and when she asks if Alice is an interior designer, Alice hesitates before claiming the title and revealing that she is applying to the Parsons School of Design in New York. Isabel notices a photo of Nora as a child, and Alice explains Nora’s difficult childhood in an Irish orphanage after her mother died and her father could not care for her.

Isabel shows Alice the tarot card she drew for herself today, the Moon in reverse, representing hidden truths being revealed. She offers to do a reading for Alice. Silently asking whether she has to have the baby, Alice draws a card but panics and tells Isabel not to read it. When Isabel asks for a word to describe herself, Alice first says “reliable” but then changes it to “blooming.”

Finn finds Alice and asks to go to a friend’s house after dinner. Alice refuses. The smell of oysters from the caterer makes her nauseated, and she flees upstairs. In the bathroom, Kyle finds her and assumes that her illness is work stress, suggesting she quit. Annoyed, Alice tells him that she loves working and is doing it for herself. She then reveals that she’s pregnant. Kyle tries to be reassuring, but his forced positivity annoys her. Alice reflects that neither of them feels any joy about the pregnancy, and it is not just because of the risk of developing preeclampsia again.

Maggie hides in the butler’s pantry to read Sarah’s text saying that she’ll call on Sunday. Enraged, Maggie texts back telling Sarah never to call again. She promises herself that she will confess everything to Isabel later.

Maggie remembers when Frank walked in with his and Sarah’s young daughter, Hope, when Sarah tried to kiss her. Maggie heard Frank call Sarah the affectionate nickname “Bunny,” shattering her illusions about Sarah’s supposedly bad marriage. Sarah calmly lied to Frank and introduced Maggie as a former teacher, but Frank guessed the real nature of their relationship. As he confronted Sarah, Hope began to cry, making Maggie fully realize the damage she had caused. Frank escorted Maggie out. Outside, Sarah’s son, Oliver, saw Maggie from the car and waved to her. Back in Vermont, Maggie had a chance to confess to Isabel but lost her nerve.

In the present, Maggie rushes to the shower. Isabel discovers Sarah’s text on Maggie’s phone and confronts her. When Maggie tries to claim that she ran into Sarah, Isabel sees through the lie. Maggie confesses that Sarah is the mother of Oliver Thompson, one of her and Isabel’s students. Isabel is shocked and furious that Maggie kept this a secret and storms out.

On Thanksgiving, Cait watches from her bedroom window for Luke’s arrival. She sees Father Kelly and Kyle’s friend Mukesh arrive; she intuits that Mukesh, a lawyer planning to move to London, is a potential setup. On impulse, she stands naked in the window until Mukesh sees her and then jumps away, thrilled. After deciding on a flirty outfit, she tries calling Luke again from her father’s office, but the line is disconnected.

Maggie pulls Cait aside and confesses that Isabel is leaving because she discovered the truth about Sarah. Cait feels bad but is anxious to return to the party. She sees Luke with a brunette she vaguely recognizes. Augustus distracts her, upset that Robert plans to shoot the raccoon. Cait comforts a distraught Poppy at the bottom of the stairs, aware that Luke is watching. When Poppy throws a full tantrum, a humiliated Cait takes her upstairs and gives her half a dose of Benadryl to make her sleep.

Returning to the party, Cait discovers that Luke is gone. At the raw bar, Luke’s companion introduces herself as Nicole Shirley, a former high-school track teammate whom Cait remembers as someone who cried when she lost. Alice confronts Cait, telling her to help more with their parents and accusing her of making the day hard for their mother by inviting Luke. Alice reveals that Luke is on the back porch setting up Hammerschlagen, a nail-pounding game he learned in Joshua Tree, with Finn and Kyle. She cuts herself off when she sees Maggie’s distraught appearance.

In the foyer, Maggie lies to Nora and says that Isabel is leaving because of a situation with her cousin. However, when Isabel comes downstairs dressed to leave, she tells Nora, Alice, and Cait that the real reason for her departure is an argument she had with Maggie. Everyone looks to Maggie for an explanation, but she only says that she’ll drive Isabel to the train station. Cait and Alice try to persuade Isabel to stay, making Maggie feel worse. Isabel politely declines and leaves.

In the car, Maggie tells Isabel that she didn’t have to reveal that they had fought, preferring her lie about a family emergency. Isabel replies that telling the truth about the fight is just being honest and suggests that Maggie should try it. Maggie is silent in response.