Geoffredo Scarciofolo (using the pseudonym "Jeff Cameron") is the famed gunfighter Sartana, who is offered a chance at amnesty from the $12,000 bounty on his head if he wipes out Benny Randal, his brother Baby Face, and an equally nasty sheriff.
At the request of the CIA, British secret agent Lester follows the ominous scientist George King, who, after successfully sabotaging an American rocket launch, has announced to the world's powerful that he can disable any nuclear weapon...
Italy, the early 19th century. A villa is the home of a small English community, all rich and superficial people lounging about in its beautiful surroundings. Claire, George's wife, and Robert, her son, are murdered by a mysterious killer. Thinking the murderer is one of the family, distraught George devises a plan to unmask the culprit. Having met a woman, Ann, who is a dead ringer for Claire, he takes her back to the villa and announces their imminent marriage. Ann is considered an outsider and treated with contempt and hostility, while George fails to find any significant clue to the solution: everybody is to be blamed, at least morally, but the final revelation is more bitter than expected...
Fernando returns home from his self chosen exile in Texas to get revenge for the death of his siblings. Instead he tries to start a revolution against the despotism of the landowners, but his relationship to his old friend Cipriano, who had turned in the meantime to a simple bandit, destroys his plans.
Seven masked bandits, whose chief calls himself "Mormon", kidnap young Susy, cousin of the mayor of Clayton City, Frank Clonny. Frank accepts the $15,000 ransom requested by the bandits and thinks of a plan which will permit him, with the help of Benson, the sheriff, to free his cousin, recover the money and capture the outlaws. The plan, though, is destined to fail, because one of the mayor's men, Donovan, allows the bandits to escape the trap. Benson then decides to call in Sartana, who the Mormon immediately tries to eliminate with the help of four killers: Buffalo, who kills with a bullwhip; Martinez, an expert knife thrower; Sullivan, a giant of incredible strength and Silky, a sly and fast gunslinger.
