While Ludovic Dubois, a young summer camp monitor in Saint-Benoît, entertains the children by playing Robin Hood, the lord's niece is kidnapped by her uncle, in the castle next door. Helped by the children and the customs inspector, the last of the Robin Hoods will free the "Princess Isabelle", and will end up marrying her.

Roger Nicolas
Ludovic Dubois

Nicole Maurey
Isabelle Delorme

Henri Vilbert
Customs inspector

Lucien Nat
Antoine Levêque

Charles Bouillaud
Julien
Luc Andrieux
Accomplice

Raoul Marco
The Principal

Albert Michel
Gendarme

Michel Dumur
Kid
Jacques Gencel
Kid
Serge Lecointe
Kid
Yves Derangère
Kid

Jack Ary
(uncredited)
Dominique Brun
(uncredited)
Maurice Dorléac
Captain (uncredited)