Taw Jackson returns to his town after three years in jail on a false charge from Frank Pierce, who actually stole his ranch and made a fortune from the gold found there, so he's obviously out for revenge. Pierce offers $10,000 for Taw's scalp to the region's best shootist, Lomax. But Taw makes him a better offer: a fifth of a half million shipment in gold from the mine in Pierce's 'new toy', an armored stage coach with build-in machine gun. First they must assemble a small team of specialists: juvenile explosives expert Billy Hyatt, alas a drunk and blabbermouth, Indian scout Levi Walking Bear to deal with the local tribes, which they must liberate from a Mexican brigands gang, and old Wes Fletcher, who is insanely jealous about his younger, bought wife. Yet the plan doesn't go smoothly for either side.