Hubert and Girwidz find the wealthy lawyer Stefan Oberländer floating dead in the lake. Apparently, he was a playboy. In his cell phone, they find Barbara Hansen's phone number listed under the contact name "Glücksbreze." She has recently started baking and selling pretzels with daily sayings, and Oberländer was one of her customers. Apparently, he ate one of these pretzels shortly before his death.