Colella, a struggling mechanic is raising his son Fabrizio since his wife died. The boy is friends with Antonio, the son of the extremely wealthy and unsavory Filippini. When criminals kidnap Antonio near his school, Fabrizio tries to help, but the kidnappers grab him, as well. They demand a huge ransom for the boys, but Filippini refuses to give in to criminals and put the lives of the boys at stake. Colella and the police are helpless.