An ostensibly simple, but hazardous job of delivering some much-needed nitroglycerin components to a burgeoning railroad town in the Arizona Territory proves problematic for the trio of River Hicks, Connor Mack and his twin sister, Abby.
Along the way they rescue a Chinese man on the verge of being lynched by a pack of crooked deputies. Moved by the Chinese man’s tale of his quest to free his beautiful fiancée from the savage grip of human traffickers, they are surprised and dismayed to find the girl is being held in the town of Woodman, which is their own destination.
The town is run by a brutal, self-aggrandizing strongman who has taken over and renamed the town after himself. This self-anointed Duke also has ties to a mysterious financial backer who, unbeknownst to everyone, has enlisted an unscrupulous Pinkerton detective and a professional killer, known as The Regulator, to track down and kill Hicks, Connor, and Abby.
All trails unite in the dusty streets of the small, Arizona town where Hicks, Connor, and Abby come face to face with the vicious array of killers for a final showdown they soon realize has become a killer’s choice.