A murder sends the East Frisian fishing village of Carolinensiel into a frenzy. In the idyllic museum harbor, a male corpse floats, brutally killed in the water. The victim is none other than Torsten Oltmann, the beloved youth coach of the local football club. Detectives Bert Linnig and Nina Jürgens from the Wittmund police begin their investigation, and soon evidence mounts regarding an affair between the football coach and Katja Schmitz, the attractive mother of one of his protégés. Katja's husband, Gerd Schmitz, comes under scrutiny as he becomes increasingly entangled in contradictions. A classic murder out of jealousy. However, the deeper the investigators dig, the more suspects emerge. Even the jogger who allegedly discovered the body by chance seems to have had a score to settle with him. Was the report of the corpse's discovery merely a cunning way to divert attention from himself?.