When 17-year-old Angelika moves to Leipzig, she is forced to rent a room at Mrs. Häublein’s for a start, since her parents will not follow until a few months later. Fellow tenant Thomas, a philosophy student, is not at all enthused about his new, pretty housemate. Because of Angelika he has to move into a smaller room. Furthermore, he is annoyed at her many male acquaintances, without sensing that his aggression might be prompted by jealousy. When Angelika’s father comes for a visit, he asks Thomas to keep an eye on his daughter. Thomas takes this assignment very seriously and finally realizes that he has fallen in love with Angelika.