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Bank director Ernst Rose, owner of the Hamburg bank Traven & Co., is asked to go to the airport earlier than expected to pick up his daughter Silvia. When he arrives, he realizes too late that he has walked into a trap. He is overpowered by kidnappers and abducted. The gang around Alexander Ford and his men want to rob three and a half million from the bank vault at the weekend. But it can only be opened with four keys, which are in the hands of four so-called key holders. Under the direction of criminal Ford, all those involved become puppets in a game of life and death.