1984 in the GDR. Jürgen and Vera Färber spend their vacation with their children Martha and Mischa in the eastern Harz Mountains. Shortly before returning home, they all play hide-and-seek together in the great outdoors. Mischa disappears without a trace! The police search is fruitless. A few days later, the authorities close the investigation and demand that the Färbers declare their son dead. But Vera and Jürgen refuse to give up.