In the small American-Mexican border town of Carterville lives a small Mexican family consisting of Don Diego, his children Manuel and Lisa and the adopted American son Ricardo, whom everyone calls "Gringo". One night, the family's farm is attacked, Don Diego is killed and the gold he has managed to accumulate over the years is stolen. Gringo sets out to find the gangsters.
Over time, he discovers that the entire area is being terrorized by a gang whose backers Gringo is gradually able to unmask: They are the sheriff, the saloon owner Steadman and the Mexican horse dealer Guardo. Steadman is shot dead by the sheriff during his escape; Gringo is able to settle accounts with the remaining gangsters.
This early spaghetti western shows very clearly where the young genre was heading, and also features the first (but very traditional) western soundtrack by Ennio Morricone. The Italian co-production company (Jolly Films) was the same one that went on to produce "For a Fistful of Dollars". Cinematographer Massimo Dallamano was another key figure in the Leone film. Pay attention to how the final duel was shot and edited. It is possibly the best pre-Leone western of European origin.