After a long stay in the clinic, Natalie Schneider returns home. When her friend Annemarie secretly sleeps at the Schneider's and steals money from Peter, a scandal breaks out. Natalie takes the train to Frankfurt.
Federal intelligence officer and art expert Jo Tresko is in trouble: he is alleged to have leaked insider information about arms deals to his wife, journalist Katrin. Tresko must find the real "mole" in order to prove his innocence...
