Arno Linder has reached the goal of his dreams. He is finally a professor, married, and his wife Laura is expecting a child. The terrible days seem to be behind him, and he can resist everything - except for temptation. This temptation unexpectedly appears in the form of his old teenage love, Kaede Yoshikawa. When she suddenly has to leave the city, Arno breathes a sigh of relief - but only for a moment. Kaede is murdered, and Arno tries to uncover the killer without the knowledge of his wife or the police.