East-Berlin inspector Lars Weber is sent to West Berlin during his espionage training to make contact with the mysterious data analyst Lauren Faber, who works for the British Secret Service. His socialist father Gregor is very proud, but personal motives also play along. Lars' disillusioned uncle Conrad is struggling with his family problems, while Conrad's colleague Axel wants to break his chains with communist East Germany.

Lars Weber succeeds in getting closer to Lauren, who for the time being distances herself from the attractive young man. Conrad's daughter Klara struggles with her feelings. She absolutely wants recognition from her father, who only cares for his older daughter Juliane. Axel returns to the bar hoping to see Duncan again, but he meets Tobias who has a special secret to tell him.

Lauren is twisted between her feelings for Lars and the responsibility she feels over her son Emil. When Lauren is out, Lars is given a new assignment: Sabine Cutter, a data analyst on the American side. Juliane confronts Klara with the physical changes that her body experiences due to the medication. Duncan has a gift for Alex. Lars's father Gregor has a new informant for the Stasi. Tobias is removed from the tunnel group and contacts Alex.