Katharina Bruckner, 50, has to deal with many serious cases in the youth welfare office. Even at home she is under stress: Her husband, a surgeon, she sees arm in arm with a younger. And her daughter, who has to go to Marrakech for work, quickly incurs her grandson. In this situation, school psychologist Schubert asks her for help: The city-renowned architect Bremer has appeared with him with her seven-year-old son because of its over-activity in school. The boy looks scared, claims that the Bremer is not his mother, suddenly seems to have disappeared.