A young woman is found dead in the Rheinauen. Karina Cervinski was neither raped nor robbed and is believed to have known her killer. Lena Odenthal and Mario Kopper begin to investigate Karina's environment. Her husband Horst, owner of a small metal foundry in a Ludwigshafen suburb, is deeply saddened when he receives the news of his death. But within a very short time, Lena and Kopper find out more about Karina than her husband seems to have ever known. A therapist, a lover, even a pregnancy – everything is said to be completely new to Cervinski. Karina's esoteric friend Claudia Schmitter can tell you more. She not only refers to Karina's disastrous horoscope, she also knows her psychotherapist.
But even Claudia doesn't know whowas the unknown lover who soon becomes the key figure in the investigation. Therapist Richard Gelpke could be of help in analyzing Karina's mental secrets. But between him and Lena there is a spontaneous rejection, so that Gelpke refuses to reveal more than the most necessary information about his client's anxiety neurosis. Horst Cervinski can no longer control himself in his sadness and jealousy and attacks anyone he mistakenly thinks is his wife's lover. But Cervinski has an alibi for the time of the crime, he can't be the murderer of his wife. Stuck in a dead end, Lena reluctantly takes on the provocative Richard Gelpke again for clues about the personality of the lover and alleged murderer.