Montmartre in the summertime. A group of street urchins idles outside while the other kids of the neighborhood are away on holiday.To keep the gang busy, Pivolo, their leader, has an idea : they are going to kidnap Aunt Faguet's doggy. Just for the fun of it. A few days pass after the crime is accomplished and one of them suddenly realizes that a reward is being offered by the aunt to anyone who would bring her her pet back. Mademoiselle Hélène, the kind-hearted social worker, does it for them and gives them the reward money, which is instantly exchanged for lollipops, nougat and merry-go-round and cinema tickets. So, why not continue? That's what they do, abducting several dogs, until they realize they are becoming ... too rich! They can't buy themselves luxurious gifts or else their parents are bound to suspect something. Instead, they decide to do good by helping poor people around them. One day, Pierrot, a member of the gang, gets run down by a cyclist and becomes blind.

Charles Walter, a forestry contractor, has helped Noël Portal to start a new life. When Victor, the new foreman and Charles'wife's lover, is found murdered, everything points to the guilt of the deceived husband. To save his benefactor, Noël decides to accuse himself of the the crime. He is condemned to death.

The king orders viscount Florestan to take mademoiselle de Solanges for his wife. But the viscount doesn't know the young lady at all. The latter decides to seduce her future husband by introducing herself to him with the name Veronique...