After a heavy quarrel with her mother the 14 year old Lilli Fischer disappears without leaving a trace. A horrible time of uncertainty begins for her parents Marlis and Henry Fischer, because they have to expect with the worst. The police are on, and Commissioner Luke Frieden takes over the case. During the investigation Marlis learns things about her family, she never would want to know. The only person for confidence in this difficult time is Luke. Lilli's disappearance has set a motion of mechanism that nobody can stop any more.