When a Wells Fargo stage is robbed and all the passengers murdered, Sheriff Luke Callaghan is suspicious of Jackson Tate's claim that this was the work of Apaches. He sets off in pursuit of Tate and his gang, only to find himself battling the gun running Mexican bandit, Hector Salinas. Things go from bad to worse, and Callaghan is forced to defend his beloved town of Maxwell against attack, to attempt to prove the innocence of his friend Matt Carver who is suspected of involvement in the robbery, and rescue his sweetheart Christina from kidnapping.