Long-distance bus driver Beni Gisler sees the man on the bridge, but there is nothing he can do. The body hits the windshield and is thrown away. In his previous life, Gisler was a train driver and was involved in suicides several times. The latest incident therefore brings back traumatic memories.

Inspector Flückiger knows Gisler from his time in the military. Supported by the psychologist responsible for the care team, he takes Gisler under his wing. It soon turns out that the dead man had a high dose of benzodiazepine in his blood. Under these circumstances, it would have been impossible for him to throw himself off the bridge alone. The identity of the possible victim also raises questions. Inspector Flückiger and colleague Liz Ritschard begin to investigate.