The young zoo employee Sonja is abandoned by her friend and colleague Jens. The mentally unstable woman freaks out. She adores Jens and in her exaggerated jealousy she fears that he wants to return to his ex-girlfriend Conny, who is paralyzed after an accident. She threatens to kill herself and the baby collared bear Gustav, who is in her care, if Jens doesn't change his mind. Can Sophie, Bärbel and Dietmar persuade Sonja, who is determined to do anything, to give up?
