Alfons is very unlucky boy. Even when he intends well everything is going wrong, so his life is full of various mishaps.

When a scuffle breaks out between the members of a criminal youth gang, one of them is stabbed to death. Since the knife belongs to the gang member Rocky, the judge assumes that he must have stabbed him too and sentences him to six years in prison. When he is released, he immediately sets off in search of the real culprit.