Doc Holliday is on the trail of his stolen horse, which turns out to be in the possession of the infamous Billy the Kid. When Doc shows up in Lincoln, New Mexico, the town's Sheriff, Pat Garrett is delighted to see his old pal. However, their relationship becomes cool when Doc befriends Billy. When Billy is shot, Doc hides him with his girl Rio who proceeds to fall for the outlaw, despite the fact that he treats her poorly. Emotions rise between the four protagonists in the midst of an Indian raid, until a fateful climax.