Joaquin Monegro feels a huge hatred for Abel Sánchez, who was once his best friend. Over the years, Monegro marries without love, and tries to have his children marry, but not forgetting Abel so far.
After the discovery of two murders, Commissioner Chabrier, of the French secret services, is investigating the disappearance of plans affecting the national defense of the country robbed by a gang of international spies.
Giovanni used to be a humble, mild-mannered government clerk whose life was turned upside down when he met Giulio, a notorious forger who at once set about manipulating the over-confident man.
Slip and Sach are working for a local newspaper as a reporter and photographer, respectively. Slip wants to get the goods on a local gambling ring that is fixing sporting events, so he and Sach go undercover to expose the ring.
A hated country gentleman is murdered, and the inspector on the case takes the veiwer through his thoughts about the possible murderer and motives as he questions everyone concerned.