Inspector Lukas Laim has the rope from which a corpse is hanging from the bridge on Prater Island cut. There are strange red marks on its stomach. The dead man is a notary from Grünwald who is well known in the city as a patron of Jewish art. And the marks on his stomach are in Hebrew and mean "retribution". Retribution for what? And why the Hebrew writing? Shortly afterwards, Laim learns of a blackmail letter to his mother, signed with the Hebrew word "Shilem". The blackmailers demand 80,000 eu...