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After sixteen years of marriage, a man finds himself attracted to another woman while dealing with his wife's emerging mental illness...

Mark continues his relationship with Danni. Flashbacks recall their difficulty conceiving a second child as well as Lorna's miscarriage. Mark sees a psychic as research for a script.

Mark learns of his Jewish heritage. Stephen shows up drunk and throws a plant through Mark and Lorna's window. Mark confronts both Stephen and Lorna about the mysterious Teddy, but gets a straight answer from neither. Mark flashbacks to the first time he was almost unfaithful to Lorna (with a prostitute) and sleeps with Danni for the second time.

Mark has a recurring dream about a rat. Danni starts seeing a divorce lawyer. Lorna's sleeping pill causes her to begin sleepwalking, which leads to Mark losing a lot of sleep. Mark learns the truth about something in his past and breaks up with Danni... but maybe not for good.

In the wake of their 17th anniversary, Mark discovers the shocking truth about Lorna's mystery man, Teddy, and how out of order his life really is—which forces him to make some life-changing decisions.