A patient is murdered at a psychiatric hospital. Everything indicates that the murderer is another resident of the institution with a dark past.

It looks like there's a serial killer in town. A profiler cooperating with the department joins the search. He seems to have something to hide.

A woman dies under strange circumstances. The victim's husband admits to the murder at the scene. However, an autopsy reveals a surprise.

Joanna is sure that Kaszowski is involved in a specific operation. Uncertain of his motives, she examines a suspicious case from the inspector's past.

Kaszowski's wound turns out to be minor. However, another problem arises — Joanna's boss has kidnapped her father and son.