Une corde, un Colt (1969)
Directed by Robert Hossein

Film Synopsis

Hostilities between the three Caine brothers and the Rogers clan escalate into a murderous feud when the former steal some horses belonging to the latter.  The Rogers repay their detested enemies by capturing one of the brothers, Ben, and lynching him in front of his terrified wife Maria.  From this moment, Maria Caine has one thought: to avenge the death of her husband.  Without a moment's delay, she sets off for a nearby village and enlists the help of Manuel, a cowboy who is used to his own company.  Maria knows that Manuel has loved her for years and will do anything for her.  Sure enough, the cowboy agrees to be a willing participant in her determined vendetta.  By coming to the aid of the Rogers brothers, when they are menaced by three strangers, Manuel rapidly gains their confidence.

Manuel is soon working on the Rogers' vast ranch, a trusted and valued addition to the family.  One night, he sets free his employer's horses, and in the commotion he takes Johanne, the younger sister of the Rogers brothers, hostage.  On the brothers' return to the ranch, Maria is waiting for them and ready to make her demands.  Johanne will only be released if they agree to give her husband a proper funeral.  The other two Caine brothers, Thomas and Elie, make additional demands, insisting they will keep Johanne a prisoner until the Rogers family hand over a large ransom.  This unexpected intervention ruins Marie's plan and she ends up being captured by the Rogers brothers, who show her no mercy.  Marie's death so enrages Manuel that he goes after the Rogers, intent on wiping them all out...