Big Jake McCandles is on the trail on bandits in this action drama that stretches from Texas to Mexico. It's 1909, and the Old West is giving way to modern times. When the outlaw gang led bu vicious John Fain raids Jake's ranch and kidnaps his 8-year-old grandson, Jake's wife, whom he hasn't seen in 18 years, sends for her husband to rescue the boy. While the law gives chase in rickety automobiles, Jake saddles up with an Indian scout, a faithful dog, and a box of money. But paying ransom isn't Jake's idea of good old frontier justice.