A Cranach is stolen from the Konstanz Art Museum. The restorer who worked on the painting lies dead next to the empty frame. Stabbed right in the heart with a targeted scalpel blow. "Criminology can be that simple," says Kai Perlmann, the assistant to Chief Inspector Klara Blum. Because he saw the suspected killer run away. The man is well known in the art museum. It is Jan Reuter, who has been the assistant to museum director Doris Koch for six months. Apparently he hid his second sight well from everyone. While Klara Blum and her team are looking for Reuter, they succeedSuspects to hide with an unknown. Jan gains Birgit Winkler's trust and she helps him escape from the police. Birgit believes his protestation that she stole the painting but did not kill for it.
She falls in love with him. Without suspicion. When Klara finds out that the museum director Koch paid the restorer hush money, she develops a completely different suspicion: something is wrong with the stolen masterpiece. And suddenly there is not just one, but several suspects. Criminology is rarely that simple...