Weigels try to recapitulate how the cake mishap could have happened. Margot suspects Kleiber of having deliberately concealed from Wolfgang that he was only allowed to deliver diabetic cakes to the retirement home. When a tabloid newspaper comments on Wolfgang's mishap, it is noticeable in his sales. Some regular customers suddenly stay away from the Weigel confectionery. Wolfgang is happy when the old lady in the retirement home is feeling better again. He decides to inform the bakers' guild. But Kleiber has already preceded him ... Till and Marc have picked up an old bedside table from the bulky waste. During the renovation, they discover an old diary in a secret compartment. Antonia is fascinated by the writer, whose name was Solveig, who has studied astrology extensively. Marc and Till make fun of the 'humbug', but they stop laughing when Antonia finds a prediction in Solveig's horoscopes that actually comes true ... Corinna has to come to terms with her separation from Alexander. The flatmates try to help her with this. Because no one can believe that the separation is supposed to be final, everyone gives Corinna his patent recipe for a functioning partnership. When her friends start picking on Alexander and portraying him as a bogeyman, she's running out of patience.