Carnival in the Black Forest. State of emergency, also for commissioners. Franziska Tobler and Friedemann Berg let themselves be carried away, drifting through parades and pubs. However, they are also called to a crime scene: Philipp Kiehl, who accompanied his wife Elena to a cosmetic operation in the Black Forest, lies dead in his hotel room. It soon becomes clear that he spent the evening of his death with Romy Schindler. Romy is now a nurse in thebeauty clinic, has a young son and lives with doctor David Hans. She used to work in Escort and Kiehl was one of her clients. He had persuaded Romy to meet him again at the hotel. Just a fun evening, a spontaneous impulse, Romy Schindler assures the inspectors. David Hans assures him that he didn't mind. But both are suspects and the pressure on them and their relationship is increasing.