Olga Sundbom is divorced and has custody of her spoiled son Krister. The lack of upbringing has made Krister an intolerable petty gangster. He is therefore put in a boarding school in a smaller town, and his getting in is due to a scam he himself is responsible for. Soon he turns the little idyll upside down.
Stig Olin
as Krister Sundbom
Stig Järrel
as Björn "Mankan" Mander
Marianne Löfgren
as Olga Sundbom
Arnold Sjöstrand
as Bring
Elsie Albiin
as Rosa Langenfeldt
Erik 'Bullen' Berglund
as Hacksén
Ingrid Backlin
as Vera
Ingemar Pallin
as Bengt Ekner
Harriett Philipson
as Birgitta Mander
Gunnar Björnstrand
as Dr. Bertil Langenfeldt
Börje Mellvig
as Furustam
Bengt Logardt
as Åke Holm
