The plot of this film is a bit more involved than just three guys getting together and making plans to blow up a dam: Clem Slade(Arthur Loft), member of the John Brent (Jack Cowell) outlaw gang, kills and robs a Mexican storekeeper in a border town. He then visits Dolores Lopez, whom he has deceived with a fake marriage certificate and who is ill. Slade takes the money her father, Pancho Lopez(Julian Rivero), has given her, beats her and the old physician (Earl Dwire) attending her up, and makes his getaway. Dolores dies and her father takes up Slade's trail, intent on vengeance. Jim (Bob Steele), a young cowhand visiting his Aunt Emma(Vane Calvert),also takes up the pursuit of the killer, as does the Sheriff(Lafe McKee), and none of the three know the others. They come together in a cabin and each of the three mistrusts the other two regarding their motive for being there,and the Sheriff does not inform Jim or Pancho that he is a lawman. Each has a reason for keeping his true identity unknown so, during a card name, Jim identifies himself as "Ace", the Sheriff says he is "King" and Pancho settles for "Jack." They travel together to Mirage City, which is run by Brent and his gang, including Slade, whom Pancho does not know is the man who betrayed Pancho's daughter. The creek furnishing water to the town and ranches has gone dry and Brent controls the only stock of water through a reservoir he owns. Brent has a niece, Beatrice/Bee(Renee Borden), who is unaware that her uncle has damned the creek up in the hills in order to create his water monopoly. Brent also controls all of the ammunition in town. Ace, King and Jack set out to remedy both situations. Pancho's remedy is a bit grim and stark.