Lillemor Appelgren

The kids on the south side of Stockholm get together to help their friend Kalle out when he's broken a window, by starting a fund-raiser. But some older kids are after the money.

Knatten and Janne, just released from the prison of Långholmen, meet a romantic Stockholm in the 40s. Knatten tries to earn money while Janne is looking for the music.