A shock for Commissioner Stedefreund (Oliver Mommsen): After a night of drinking, his friend Peer (Michael Pink) has disappeared without a trace! Blood stains in his apartment point to a crime. Stedefreund and his colleague Inga Lürsen (Sabine Postel) are looking for an African asylum seeker (Florence Kasumba) whom the men had taken home during the night . Because suddenly there is no trace of her either. The detectives find out that she specifically targeted Peer and three of his colleagues from the water police. Inga doesn't sense anything good, because the four officers were once deployed in the Mediterranean for the European agency Frontex. Is revenge involved here? But what for?