Heike tells Antonia that Marc has invited a complete stranger named Ute to the concert. Antonia pretends she doesn't care. When she sees Marc and Ute together in the courtyard, she is very hurt, but does not show anything to her father. By chance, Till meets Ute and Marc at Schiller. The next morning, he tells Antonia how well the two seem to have gotten along ... Martin is still missing. Corinna is sick with fear for her brother. She wants to call the police if Martin doesn't report soon. Her roommates try to calm her down. Then a letter arrives from Martin stating that he wants to kill himself. Corinna has an idea of where her brother might be. Together with Armin, she races off to save him ... Irene finds it difficult to see Sophie suffer and still conceal from her the truth about Mr. Eiler's disappearance. She confides in her son Chris. He advises Irene not to tell Sophie, otherwise Margot would carry out her threat. But Sophie suspects that Irene is hiding something from her and confronts her. Irene finally tells her about Margot's intrigue. Furious, Sophie seeks out her sister and gives her a resounding slap in the face.