Schimanski and Thanner are confronted with a case that happened a long time ago and that they were unable to solve: in 1978, one of the perpetrators was seriously injured during a bank robbery and was then executed in the bank by the leader of the gang. The perpetrators managed to escape - except for the Pole Zbiginiew Pawlak, who waited next to his dead brother until the police arrived. During the subsequent investigation, Pawlak was unable to say a word. The press then nicknamed him "Moltke", which he kept even during his prison sentence because he remained stubbornly silent.