Marc regains consciousness. Luckily, Olaf is on the spot and diagnoses a mild concussion. Olaf scolds Antonia and Marc is out of sorts with her. Marc's mother Regina Albrecht, a successful businesswoman, comes home immediately when she learns of the accident. But then an important appointment at the bank forces her to leave her son alone again. Regina feels torn between her professional duties and her role as a mother. Marc disappears a little later, despite the prescribed rest, secretly for a meeting. Only his friend Till is initiated by him. Olaf is happy when he learns from his sister that Margot Weigel wants to reduce the rent for the free apartment in the house as long as he is unemployed. He doesn't know that Wolfgang and Irene are contributing 200 marks out of their own pocket to make this possible. Margot has prejudices against the 'East Berliners'. Corinna and Jennifer are struggling with the moving boxes when they unexpectedly get help from Chris, Alexander and Armin. The latter is also looking for accommodation and is enthusiastic about the luxury attic. Chris shows them a 'secret' meeting place - the roof. The siblings Olaf and Irene quickly regained their trust in each other. They do disagree about only one thing: Irene doesn't think it's okay that Olaf has lied to his daughter about her mother all these years. But Olaf is afraid to tell Antonia the truth.