Ben and Joe stop in Los Robles for a couple of beers and a night's rest. Ben sees the town boss, John Walker, bullying the saloon waitress, and he comes to her defense. When Ben steps outside of the saloon, Walker shoots him in the back. Badly wounded, Ben shoots back, killing Walker just before he falls unconscious. While Joe keeps a vigil at Ben's bedside, the priest tells him Los Robles had always been ruled unquestionably by John Walker and his son Jed. Now Jed will certainly want revenge. Sure enough, he tells Joe if he doesn't hand Ben over in 24 hours, he will kill every citizen in Los Robles, one an hour.

To complicate matters more, Walker's foreman, Garth, deliberately tells Jed that Ben shot his father in the back, in hopes that Joe will kill Walker, so he can run the Walker ranch. When Joe tries to mobilize a few citizens to fight Walker and his army of men, he finds a town full of cowards. The biggest coward of all is the doctor. He purposely left the bullet in Ben's back, hoping that he'd die within 24 hours. Jed and Garth make final plans to blow up Los Robles with dynamite, unless Joe surrenders Ben to him.