The filmmakers first meet Stefan in 2015, in the therapy ward of Brandenburg Prison. Their first impression is of a polite, shy man. A warder tells them Stefan is an ice-cold woman-killer. The filmmakers follow him through the last years of his prison term. They face some uncomfortable questions. Can anyone really know what is going on inside this man? The part of the protagonist is taken by a puppet, the scenes shift into theatre. Truth and falsehood blend in a cascade of presumption.