Martin Benson is a Civil War veteran and former outlaw earning money and clearing his name by working as an undercover agent for the US Army.

Despite his monetary rewards and the three pistols and gun belts of the executed men that he has posted home to his father, who still believes him to be an outlaw, Benson wants no more of the undercover life.

Upon their return Daniel, the older brother spies an unidentified wounded man who they take to a cave to nurse back to health so he can identify who was responsible for the outrage.

Martin Benson returns home and together with Daniel carry out their own revenge, retaliation and retribution as well as discovering the identity of the ringleader.

As was the custom of several Spaghetti Westerns, a track from Ennio Morricone's A Fistful of Dollars features in the film.