Synopsis
Looking to add to his gang's numbers, Gordo "Gordon" Wacht (Torrez Gordon Wacht in the Italian version) (Fernando Sancho), raids a jail at the Mexican border. As a sign of loyalty, every member of Wacht's gang is to be branded with the same “S” on their left arms. All who refuse to join his gang are to be shot dead. One of the prisoners, Arizona Colt (Giuliano Gemma) is able to avoid being detected by Wacht's men. It's through escaping from the prison where he meets one of Wacht's men, Whiskey (Roberto Camardiel), a drunkard that was left behind. Arizona agrees to bring the man to the gang leader, and once there, Gordo gives Arizona the same proposition as the rest of his men: join his gang or die. Arizona responds to said offer with his catchphrase, "I'll have to think about it." Unsatisfied with his answer, Gordo attempts to shoot Arizona, but the man proves to be a quicker draw and shoots the gun out of his hand, as well as shooting one of the gang members attempting to ambush him. While riding off on horseback, Kay (Clay in the Italian version) (Giovanni Pazzafini), shoots and wounds Arizona, but it turns out to be a trick, allowing him to evade the gang.
While the Wacht gang make a camp in the desert, Arizona keeps an eye over them, pondering whether or not he'll join their gang. Frustrated, Gordo sends Kay and 5 of his men to kill Arizona, but once again, Arizona tricks them, kills 5 of Gordo's men, and robs Kay of his clothing. On their travels through the desert, Gordo, Kay and the rest of his gang find the 5 dead men, their bodies spelling out the word "NO" - Arizona's response to Gordo's offer. From there, Gordo sends Kay to run reconnaissance on a peaceful little town named Blackstone Hill. On his way there, he runs into Arizona, whom he pleads with not to give away his identity. Once again, Arizona responds with, "I'll think about that.". As the two hang out in the bar, Kay hits on one of the bartender's daughters, a woman named Dolores (Rosalba Neri). However, upon noticing his scar, he's left with no choice but to kill her and ensure her silence. The next morning, Dolores' body is found, and her father, Pete (Pedro in the Italian version), as well her sister, Jane (Corinne Marchand), grieve for her. Determined to catch her sister's killer, Jane is under the impression Arizona might be him, but thankfully, Pete is able to confirm Kay's identity after Gordo and his men rob the town's bank on that very same day.
From there, Arizona offers to turn Kay in, dead or alive, on the condition he is paid $500, and is allowed to marry Jane. Ever the opportunist, Arizona approaches Gordo's hideout, where he attempts to bargain. His proposition is that in exchange for buying Kay off of him, they split the reward money. Interested, Gordo makes the two men fight to the death. Ultimately, Arizona wins, and is double-crossed by Gordo, who not only shoots his arms and legs, but leaves him to die in the desert. It’s Whiskey, a member of Wacht's gang, that not only steals Gordo's money, but brings the injured Arizona and Kay's corpse back to Blackstone Hill. Arizona is given a hero's welcome, and while he recovers, he is taken care of by Jane. Pete and the townsfolk, realizing that Arizona might actually marry Jane, and under increasing suspicion about where Whiskey came from, force the two out of town.
Arizona and Whiskey hide out in an abandoned church, where the former practices aiming with his injured hands. Unfortunately, Gordo returns to Blackstone Hill, looking for Whiskey and Arizona. Under the impression that the townsfolk are lying about not knowing their whereabouts, Gordo and his gang rampage the town, and begin killing people. Jane finds Arizona and tries to convince him to come back. Only when Whiskey shows Arizona the money he's been hiding, does Arizona consider returning to Blackstone Hill. This upsets Jane, who leaves in frustration calling him "worse than a leech.". Whiskey says he's going to return to Blackstone Hill, and upon his hands healing, Arizona does too.
Whiskey tries in vain to fight off Gordo and his men with explosives, wiping out some of the gang. Unfortunately, one explodes near him, and he is presumed dead. At this moment, Arizona returns to town, where he confronts Gordo. Using a suit with fake bandaged hands, Arizona is able to trick Gordo into thinking his hands haven't healed yet, allowing him to take out the rest of his men quickly, leaving Gordo to fend for himself. Paranoid and running out of ammunition, Gordo tries to hide in the gravedigger's shop, where Arizona is able to shoot his limbs, keeping him alive so that the citizens of Blackstone Hill may decide his fate. In a twist of events, Whiskey is revealed to be alive, and is being treated, similar to how Arizona was earlier in the film. Arizona is about to leave town, but not before hugging and kissing Jane. She asks him to return one day, to collect his reward, and to stay in Blackstone Hill forever, but once again, Arizona says, "I'll think about that," as he rides off and the credits roll.
