In 1881, a bandit gang commits armed holdups of several trains. The railroad company
Twinnings & Co puts up a reward of $15,000 for whoever brings those responsible in dead or alive. John Cooper, a traveling
gunfighter, decides to pursue the bounty and gathers a team of his old acquaintances: explosives fanatic Sam Williams; Doc McCoy, a physician, sharpshooter and lockpicker; and gambler and con-woman Kate O'Hara. After questioning cantankerous
U.S. Marshal Jackson, the group apprehends bandit gang leader Pablo Sanchez, whom Jackson has implicated, but as they attempt to deliver him to the authorities, they run into (and thwart) an ambush set by another gang of bandits. This, and Sanchez's revelation that a masked outlaw known only as "El Diablo" is behind the robberies and has a snitch at
Twinnings, convinces Cooper that Sanchez must be innocent. Cooper deduces that Smith, Twinning's partner, is El Diablo's snitch, but Smith is assassinated before Cooper can get answers. With Jackson sending a
posse to pursue the bounty hunters on charges of murder, Cooper frees Sanchez from prison and enlists his help. Sanchez guides the team to
Socorro to track down Carlos, a local tavern owner and underling of El Diablo. Mia Yung, a young Chinese American girl, also joins the team after Jackson's deputies kill her father in his own waystation, vowing revenge. While Cooper listens in on a conversation between Carlos and one of El Diablo's representatives (in which Carlos dies), Doc and Kate are taken hostage. Cooper, Sam, Mia, and Sanchez secretly follow El Diablo's gang as they use a hijacked train to deliver supplies to their boss's hideout in a remote cave. El Diablo captures the group in a trap and imprisons them while he offers Sanchez a chance to join his gang as an alternative to being tortured to death. The gang escapes with the help of Mia's pet monkey, Mr. Leone; Cooper rescues Sanchez and confronts El Diablo. To his shock, Diablo reveals that he is actually Marshal Jackson. After a gunfight, Cooper finishes Jackson off with his knife, and the latter falls out of his office's window to his death. == Gameplay ==