Isabelle tells Waylon that she is sick so she can avoid interacting with him. She locks herself in her room and watches baby monitor footage, looking for instances of her sleepwalking. When Waylon goes to bed, she goes through his briefcase. Isabelle finds an old copy of Mason’s case report, much older than the one she gave him the week prior. She also finds a recording of an interrogation that took place between her and Detective Dozier in the early days of the investigation. She uses Waylon’s laptop and finds a file marked “X” that contains information about her and Ben, including candid shots that she has never seen before. The file also contains articles about Margaret’s death.

In the past, Isabelle sneaks out of her room to eavesdrop on her father’s conversation with the police chief. The chief comforts her father, assuring him that he is not to blame. Isabelle believes Margaret followed her sleepwalking self to the marsh and drowned.

Isabelle comes out of her memories as Roscoe growls, needing to go outside. She takes him to the backyard. She walks to Mason’s window and looks toward Paul Hayes’s house, where she sees the old man in the rocking chair.