Peter wants to go to the countryside for a week to buy furniture. His sister Karin is said to be living with the Richters during this time. She manages to use a trick to stay in Tommy's apartment without Peter's knowledge ... Matthias buys the patent for the production of the 'tire jackets' and offers Vera and Clemens a share as a thank you for the tip. Shortly thereafter, Beatrice shows up at the Richters' house and demands that they leave her son alone ... Dr. Romberg is angry about André's arbitrary actions, but he can't deny the success. Tommy returns from his tour and learns of Diana's nervous breakdown. He immediately goes to her and is happy that she is responsive again ... Elisabeth wants to have her apartment renovated. Heiko recommends the all-round craftsman Hartmut Söllner. Elisabeth takes a liking to the taciturn man ... Tina 'accidentally' comes to Heiko's house and invites him to a concert. When she learns that he has reconciled with Yasemin, she is furious. But she is already making new plans when Elisabeth finds an old love letter from Heiko.