Summary Marie has received a message and is allowed to return to Cologne. But Jenny is bitterly disappointed because she needs Marie as a role model. When the owner of a horse farm, Alwin Lippes, is found dead in his horse walker, Marie is determined to solve this last case, but is happy to let Heino take the lead in the investigation. He dreams of a promotion through Marie's departure and is encouraged in this by Heike as much as possible. Suspicion initially falls on Alwin's intern Jonas, Mrs. Runkelbach's nephew. While Heino follows this lead, Marie investigates the world of horse breeder Ortlinde Deinert, who plays Wagner operas to her sensitive animals and sells the foals of her noble mares to international customers. Was her dispute with Alwin, which arouses Marie's interest, really a long time ago? Meanwhile, when Heino makes a mistake on the Jonas trail, he fears losing his career opportunity and tries to cover everything up. But he fails to see the danger that this puts Marie in. For Marie, saying goodbye to Hengasch is rather bittersweet. Despite looking forward to her old life, hasn't she grown fond of a few people in Hengasch? She quickly brushes that aside when she receives a second call from her boss.

• Comedy
• Crime
• Drama