A highly intelligent murderer fools the Paris police. His victims: young women who lived in the Bastille district. As a "calling card", the killer leaves a bloody footprint at the crime scene. It is the first case in Paris for Commissioner Maurice LaBréa. He had left Marseille with his eleven-year-old daughter Jenny to make a fresh start after his wife was murdered. Now the "bloodfoot killer" LaBréa leads to his emotional limits. He receives unexpected support from his new neighbor, the artist Celine, who takes care of his father and daughter. When the killer strikes again, LaBréa comes under pressure. His vain superior Thibon, mockingly called "the beautiful spirit" by his colleagues, threatens to withdraw his case. With the permission of the investigating magistrate, Couperin, who is very fond of him, LaBréa undertakes a risky decoy action. When his colleague Claudine is seriously injured, the bloodfoot killer strikes again and the police are still groping in the dark, LaBréa is facing off. By sheer coincidence, he finally discovers a trace of the perpetrator. But again the killer is one step ahead of him.
—ARD Das Erste