Corinna is completely frightened by Weissenburg's elevator terror. Chris, Bernd and Jennifer are at her side. Bernd sees a connection between the anonymous call to Alexander and Corinna's elevator experience. When Bernd examines the elevator more closely, he finds nothing - except an alligator clip. He then suspects that someone has tampered with the elevator. Chris knows that this meager evidence is not enough to call in the police. He makes it clear to the others that they need to gather proper evidence of Corinna's alleged threat ... Melanie is stood up by Armin, she goes to the cinema alone and watches the film 'Before Sunrise'. Later, she philosophizes about love at first sight with Aylin in Schiller and complains that it only exists in film. In the process, she collides with a stranger with serious consequences - Max. There is an immediate and elemental spark between the two ... The fact that Antonia now lives alone is an additional thorn in the side of the already irritable Margot. In the first 'clash' with Antonia, Margot threatens Irene to call in the youth welfare office. Meanwhile, Antonia prepares for Marc's arrival. Irene warns her about Margot and reminds her of the cleaning service in the stairwell. Out of sheer panic to do everything right, one mishap after another happens to Antonia. And then Marc arrives just at the moment when Margot suspects her that Sven is her new lover.