Kim, an ordinary 15-year-old given mostly to himself, is living with an unmarried mother in a small apartment. One day, he falls hostage in a bank robbery along with an unfamiliar girl falls, but after making ​​friends with the leader of the robbers, Kim and his new friend run away from them. Settling for a while in an empty house, teenagers fall in love.

The last part of the trilogy about the Vesterbro Root Per, which differs from "The Flight" (1973) and "Per" (1975) by being more comedy. Per has become socially adapted, he gets married and gets permanent work. In his rise live two originals, Kasper and his blind friend Holger, who are busy revealing housing fraud in the neighborhood.