Marceau Léonetti, a competent and energetic officer stops by chance the son of an influential lawyer driving under the influence of alcohol. A few months later, the lawyer falsely accuses Léonetti as being violent and incompetent. As a result Marceau is transferred to a small police station, where he meets young and beautiful Jeanne. Soon they are faced with a tough investigation.
El Chuncho's bandits rob arms from a train, intending to sell the weapons to Elias' revolutionaries. They are helped by one of the passengers, Bill Tate, and allow him to join them, unware of his true intentions.
History Professor Brad Fletcher heads west for his health, but falls in with Soloman Bennett's outlaw gang. Fascinated by their way of life, Fletcher finally takes over the gang, leading with a new 'efficient' ruthlessness.
