On a North Sea island, Berlin psychiatrist Viktor Larenz is trying to escape from the anniversary of his daughter Josy's disappearance. He is found there by the mysterious Anna Spiegel, who seems to know more about Josy's fate. In Berlin, Dr. Martin Roth takes over leadership of the psychiatric department in an exclusive clinic. His methods are questionable and his goals obscure.

Viktor Larenz gains an ally and tries to find out more about the enigmatic Anna Spiegel. What does the psychologically unstable woman really want from him? Meanwhile, Roth employs questionable treatment methods and suddenly finds himself under closer scrutiny from his boss.

Viktor Larenz decides to confront Anna Spiegel and triggers a chain of unfortunate events that ends in tragedy. Roth is under pressure in both his professional and private life, which puts him in danger.

Viktor struggles with the aftermath of the tragedy and makes a discovery that rocks his world. Roth delves into the Larenz family history and brings surprising things to light.

Viktor Larenz returns to Parkum for a final confrontation with Anna Spiegel. Roth tries to repair his relationship with his daughter and comes one step closer to discovering the truth about Josy's disappearance.

Roth helps Viktor Larenz solve the mystery of Josy's disappearance. Both must live with the consequences of their actions for the rest of their lives.