Two teenage Russian boys have their father return home suddenly after being absent for 12 years. The father takes the boys on a holiday to a remote island on a lake in the north of Russia that turns into a test of manhood of almost mythic proportions.
The events of the film unfold over six days and tell about the mysterious journey of a strange man and his two teenage sons who had never seen him before. Vanya and Andrey, for how long they remember, lived with their mother, who once told them that their father was a pilot. But one ordinary Monday, dad appears in their house and takes the brothers on a hike to a small island in the middle of a forest lake.