Commander Gerard and his band of guerrillas have found the ideal hideout: a nursing home in the Alps where, along with the mentally ill, are also hiding a Jewish girl and a Swiss doctor who might be a spy for the Germans ...

Benjamin Déboisé, a hatter, his salesman and a young man want to kidnap an American millionaire, put him in a bag and hold him to ransom. But they make a mistake: the fellow they find in the bag is not the millionaire himself, but his son...!