One day, a stranger enters the town looking for Jericho Jackson and his gang. Armed with one gun, he meets some gang members in the local saloon. The gang threatens him and tells him to leave by sundown.
When one of the gang members is killed by the newcomer's horse, the gang takes the man from the saloon and out into the street to kill him.
The stranger kills off some of the gang members with his only gun. Jessy, the local bar owner, reveals the stranger's identity as Johnny One. They reconnect as they both come face to face with a past that continues to haunt them as Johnny continues to hunt down Jericho and the rest of his gang.