Kai is very charming towards Melanie and persuades her to visit Sophie's apartment at night. Just as the two of them get closer, Chris rings the bell to confront Kai about his brutal behavior towards Till. He is puzzled when he sees that Melanie is with Kai ... Armin is glad that Corinna is not angry with Martin because of his homosexuality, but because he never confided in her. Alexander tries to explain to Corinna that everyone has to choose the time when they want to talk about their disposition. When Martin cannot be reached either at his parents or at his apartment in Frankfurt, Corinna begins to worry. She hopes her brother hasn't done any stupid things ... Irene's suspicion that Margot has something to do with Sophie's lost ring becomes more concrete when Margot accidentally babbles. Irene confronts her mother-in-law and accuses her of deliberately taking Sophie's ring to drive Siegbert away with a lie. First Margot denies everything, then she threatens Irene to kick her family out if she says a single word about the matter. Irene is stunned ... At the Weigels' party, where everyone celebrates Anna's recovery, Antonia gives Marc the letter to her mother with the request to read it and not show it to anyone. The next morning, Marc forgets the letter on Regina's desk. When he wants to fetch him together with Antonia, his mother holds the letter in her hand. Antonia is so disappointed that she breaks up with Marc.