Marshal Johnnie Taggart, posing as an outlaw named “Ace” Braddock, comes to Bannack, Montana to restore law and order. But he is recognized by Kitty, co-owner with Clay Curtwright of the infamous Bull Whip saloon. But “bad-girl” Kitty keeps her mouth shut. When Johnnie’s pal Andy reports a stage holdup, Curtwright’s henchman, Ben Borden, talks the sheriff and Judge Holden into suspecting Johnnie. Johnnie reveals himself to Judge Holden as a government marshal, and the judge voices his opinion that Curtwright is the leader of the road agents, but voices it in the presence of his granddaughter, Louise Holden.

On Halloween night, a serial killer returns from the dead to take revenge on the vigilantes who put him to death one year earlier.