Anna M. is a quiet, reserved young woman. She is conscientious and hon- est at work and popular with her colleagues. But then she becomes con- vinced that a happily married doctor named Zanevsky is in love with her. From this point onwards she interprets everything the man does or says – even his emphatic denial – as proof of his love for her. Her passion grows into an unshakable obsession. She follows him, spies on him, steals his letters, writes to him, sends him presents and rings him up at home, day and night. At first she is disappointed at his failure to surrender to his feelings, but then her disappointment gradually turns into hatred …