Camilla is a little girl suffering with a kidney disorder. Before she can receive her next due treatment she gets kidnapped. The gangsters intend to blackmail her rich father. Commissario Antonio Sarti knows that time is running out on the victim and takes desperate measures. He secretly organises a prison escape for petty crook Sergio Marazzi. By using Marazzi's insider knowledge of the criminal milieu Sarti detects kidnapper's hideout.