Professor Slanski gladly accepts Margot's invitation. At the last second, he smuggles the bracelet that Kai took at her apartment, back into her jewelry box. Slanski knows how to take Margot with his charm. Slanski talks her out of the mysterious noises from the cellar, which Margot thinks she hears ... Sophie surprisingly comes back from Stuttgart very quickly. She did meet Siegbert, but accompanied by another woman. Sophie is devastated ... Jennifer thinks Armin is a lousy doer. Corinna puts him to the test and offers him her 'feminine charms' - but Armin does not take it. Jennifer realizes that he really loves her, but can't reciprocate his feelings. Armin's reaction surprises her again ... Alexander is happy together with Corinna. His father Joachim gave him the opportunity to take part in an attractive research project abroad. Although the separation will be painful for several months, Corinna and Alexander decide that he must not miss this opportunity. But then Alexander overhears a conversation between his parents that leads him to believe that his father only arranged it all to separate him from Corinna.