Zatvorenik

Guido Tramnitz has already confessed to two gruesome child murders and led the Berlin police to the mutilated bodies. Although everyone is convinced that he is also haunted by six-year-old Max, who disappeared without a trace a year ago, Tramnitz, now in a psychiatric institution, refuses to talk about it. Without reliable evidence and the prisoner's confession, Max's parents will never know for sure what happened to their son.

With the help of his police brother-in-law, Max's father Till Berkhoff decides on a desperate move: he will infiltrate the clinic where Tramnitz is being held as a fake patient, armed with another man's medical records. There, he will get close to the killer and force him to confess. Because there is nothing worse than uncertainty. Or so Till thinks...