Franziska Wellmer has been happily married for several years and has a teenage daughter. At a class reunion, she celebrates 20 years of graduation with seven former schoolmates, but is drugged and raped. When she wakes up the next morning, she no longer knows what happened, only that something terrible has happened. When the police fail to make any progress in their investigation, Franziska investigates on her own and sets her sights on her seven classmates. One of them must be brought to justice.