Staunchly progressive Miriam (Martina Gedeck) and André (Peter Davor) find their laissez-faire values shaken to the core when their son's libertine 12-year-old girlfriend, Livia (Svea Lohde), disrupts the family's summer holiday. Suspecting that something untoward is brewing between the coquettish Livia and 30ish neighbor Bill (Robert Seeliger), Miriam sets off to confront him. But things don't go according to plan in this cleverly nuanced drama.