Steffi Zinn's body is fished out of a lake. A week before, her husband was reported missing when he left the apartment after a fight and hadn't returned by morning. Police Captain Lohm is charged with the investigation but can't find any evidence of murder. When an strange man appears at Steffi's funeral and is found dead a few days later, Lohm begins to look for a possible link between him and the Zinns.

Based on the novel The Man Who Climbs Over the Hill by Rudolf Bartsch.