When a lone bounty hunter assassinates a member of an outlaw group, chaos ensues. When the soon-to-be-legendary Billy the Kid's mother is murdered in the gang's savage reprisal, he is compelled to hook up with the mystery bounty hunter in order to avenge her death. Soon, he'll realize that his and the bounty hunter's lives are inextricably linked in this shoot-'em-up Western tale of gun smoke and justice.