A gunman teams up with his long-lost brothers--a French hypnotist and a Japanese kung-fu expert--to fight a villain who is obsessed with Roman emperor Julius Caesar, to the point of having built a palace, complete with slave girls, a huge sunken bath and his own "Praetorian Guard", and who is trying to cheat them out of a gold mine left to them by their father.—[email protected]
Whitaker "Whitey" Selby (THOMAS HUNTER) a bearded gunslinger, loses a rigged card game but wants to leave with the money, and is confronted by four gunslingers before he leaves the saloon. With a single shot from his four barreled revolver, he kills all four. He is followed outside by a Solicitor who wants to give Selby a letter from the late father of Selby where there is question of a gold mine in Laredo, Texas, as part of a will,l and a photo of a girl. Selby quickly decides to travel to Laredo to reclaim his father's legacy, and to identify the girl.
Etienne Devereaux (NADIR MORETTI), is a Frenchman preventing a sexual attack on a girl by three thugs in a barn. One pulls a knife, another pulls a revolver, but Etienne stops both by using only his powers of magnetism. Then he pulls a gun and shoots, merely to set them running away. Then he gently kisses the grateful brunette.
At Cedar Gap, Missouri, everybody takes part in the State Fair events, except for a bunch of cowboys who are trying to scare a Japanese man from entering the horse race. The man identifies himself as Lester Kato (JAMES SHIGETA), and is not impressed. He shows them why by disposing of the six men with his judo and kung fu. He refuses an invitation to join an itinerant show, because he is set in meeting some girl in Laredo.
Eventually the three men arrive at Laredo, and a local man guesses that they are bringing trouble to town... where Mady the Saloon Singer (Delia Boccardo) introduces her act by shooting revolvers...
The three strangers meet when they arrive at the mine in the mountains, and old miner called Stanford (Vittorio Bonos) recognizes them as the late Langley's sons...begotten from different women.
Back in town, the three talk with Mady, and the blue eyes redhead reveals to be their sister - the little girl in the photo - and tells them the story behind their origin. Their father had fought bitterly to retain his land, but had been forced out of Laredo by the powerful landowner Julius Cesar Fuller (ENRICO MARIA SALERNO), a man obsessed by the Ancient Roman leader. Mady suggests her brothers should avenge their late father and at the same time free the territory from Fuller's oppressive gang.
Later, the three half-brothers are almost lost when they try to find their father's ranch in Death Valley. Eventually they intervene to scare bandits that were attempting to rob Debbie Smith (Gianna Serra), and she offers them food at her ranch - that happens to be from her late adoptive father. When she pulls her mother's photo to show them, the men find that it's the young woman in the photo that had been given them by Lycock, the Public Notary (Gino Bardi) with the letter about the gold mine inheritance. As they talk about it, Whitey and his two half-brothers have different opinions about how to proceed. Whitey punches Etienne, and leaves them with Debbie.
Whitey pays a surprise visit to Mady's room, and accuses her of conniving with Fuller to lead them astray into the Death Valley expecting them to die of thirst. But then Stanford appears, to reveal that Mady is the late man's adopted daughter, and he has a document with him showing that the property still belongs to Harry Langley. Mady reveals to be the owner of the document because she is the late man's adopted daughter. Whitey is appalled at the idea that one of the two adoptive daughters is one too many. He puts his trust on Mady, and leaves to confront Fuller.
Mady goes to Debbie's ranch, and exposes her to Etienne and Kato, while fighting the other young woman in a long, rolling and clothes ripping fight. The two men would rather stay and watch, but Mady urges them to join Whitey at Fuller's house.
Julius Cesar Fuller lives in a replica Roman palace, wearing a toga, and surrounded by scantily clad girls from around the world; some massage him in the pool, and one, Tula (Femi Benussi) is a dancer from Hong Kong. His bodyguards are a small army of gunmen clad in all black (evoking the Django Kill film not yet produced). During the assault on the castle, Whity is captured and tortured; but before he is killed, his brothers break in and free him. Together, they engage Fuller and his men into a gun fight. Whitey kills Fuller in his hot bath.
The four brothers (Mady seems to have won her catfight, and joined the three half-brothers) take possession of their gold mine, but can't see any sign of gold. A man appears and claims that he has the lease on the land, and since the brothers can't pay the capital, they are forced out of the land after all.
The four brothers leave on a chariot, but Whitey demands that the heavy brass bed on which their father had died.Finally, they give up, and decide to go away, but Whitey imposes that they take their father's brass bed as a memento of him. When they are alone, Whitey reveals to his brothers that the extremely heavy bed is actually made of massive gold.
