Reine is supposed to go to a summer camp called Children's Island but decides to remain in Stockholm over the summer while his mother is working at a hospital. She thinks he is at the camp, and he tells her he is. We then follow him around Stockholm that summer and see what he encounters on the path of life.

Tomas Fryk
as Reine Larsson

Anita Ekström
as Harriet Larsson

Ingvar Hirdwall
as Stig Utler

Börje Ahlstedt
as Hester

Lars-Erik Berenett
as Esbjörn

Sif Ruud
as Mrs. Bergman-Ritz

Hjördis Petterson
as Olga

Malin Ek
as Kristina

Lena Granhagen
as Helen

Majlis Granlund
as Lotten