Bat Masterson arrives in a chaotic tent‑city where a gang of wranglers is stealing horses. An old flame begs Bat to save her fiancé, who has been falsely accused of murder and is about to be lynched by the victim’s vengeful brother.
Bat Masterson wins the contract of a young boxer from his crooked manager, then trains him for one honest fight—betting all his poker winnings on the kid. The former manager refuses to allow a fair match and sets up a scheme to ensure the fighter loses, forcing Bat to intervene.