Melanie and Corinna have outvoted Jennifer, Armin is allowed to stay in the apartment. Jennifer observes his behavior extremely suspiciously and thus completely unsettles him. Armin tells Chris that he's not gay. The two of them become friends. Armin surprises Jennifer with a declaration of love ... Margot expresses her suspicion of Kai Sonderhoff to Chris and asks her grandson to take a closer look at the young man. Through Alexander, Chris learns that Kai has no idea about archaeology, although he claims to be doing an internship at an excavation site. He warns Melanie about him. Together they observe Kai and see him disappear into the Archaeological Institute. They suspect that he really works there. What they don't see anymore is that a few moments later he peers out to check if Melanie and Chris are still watching him ... Marc and Ute spend a lot of time together. Antonia insists that she is not jealous. By chance, she watches with Till as the two of them kiss. For Antonia, a world collapses.