A gang of outlaws known as "The Plunderers" are terrorizing the west - headed up by Whit Lacey (Forrest Tucker). Apparently, the gang is receiving inside information from within the local town to help them set up their capers. Army Major John Drum (Rod Cameron)and Sheriff Sam Borden (George Cleveland) set up a plan where Drum will hopefully infiltrate the gang and thus lead to their eventual capture. Drum becomes friendly with Lacey to the point of "marrying" his girl friend Julie Ann (Adrian Booth) to aid in Lacey and Julie Ann's eventual escape. Drum while playing along with the masquerade, becomes smitten with saloon singer Lin Connor (Ilona Massey). All seems to go according to plan as Lacey is captured and taken to the army fort to be hanged... but just as justice is about to be served, an enormous horde of Indians attack the fort, and every able bodied person is needed to help in the defense!

This was one of Republic's better westerns shot in Trucolor and with an apparent higher budget than usual. The story is filled with a few little surprises to keep the viewer's interest. The Indian attack is one of the better staged such attacks making use of the studio's crack team of stunt men. As for the cast, Ilona Massey with her thick European accent is totally out of place here. It seems studio head Herbert J. Yates had a thing for European actresses. He would later marry a similarly accented actress: the oft-maligned Vera Ralston. Rod Cameron as always makes a fine upstanding hero, Forrest Tucker has you rooting for him as Lacey, Grant Withers plays against type as the dumb Deputy. Paul Fix is Tucker's henchman Calico, Francis (brother of John) Ford plays storekeeper Barnaby and Taylor Holmes upstanding citizen Martin. Other familiar faces (to "B" western fans) appearing are Hank Bell, Wheaton Chambers, Bud Osborne, Franklyn Farnum, John Hart, Clayton Moore (both of whom played The Lone Ranger) and 30s star Rex Lease.