A warrant brings Marshal John Breaker and Deputy Bugle Bearclaw, cross-country to deliver a dangerous criminal. But, when they make a stand on behalf of a judge, can they defend a small town from the most ruthless gang in the West?

Musical version of the Robert Louis Stevenson story about a doctor who conducts an experiment on himself that results in his bringing out the dark, murderous side of his inner self, "Mr. Hyde".