It is not the first horrific crime scene for Vera Lanz, but perhaps the most absurd: an unrecognizable torso, stowed in a suitcase with the victim's identity card on top. Will more suitcases with body parts show up? Despite the identity of the victim, the traces are desolate. Lanz's only chance would be a witness when the next suitcase was put down. But prosecutor Sebastian Hartmann is reluctant to go public. Even police psychologist Erik Lambert cannot dismiss the hypothesis of a serial offender. When the last suitcase turns up, there is a witness. It is Vera's father-in-law Georg Lanz who must have seen the alleged murderer. Only Georg doesn't remember anything. But the perpetrator does not know that - and Georg is in mortal danger.