Set in the Wild West; a group of gunmen are defending the law led by Billy the Kid after the murder of a cattle rancher in town, but they find themselves chased when they take revenge on the man who killed the rancher.
The famous gunslinger Billy the Kid rescues Doc and Chavez after their arrest, and the three outlaws plan to head to Mexico; meanwhile, the authorities, desperate to arrest them, decide to recruit another outlaw, Pat Garrett, to do the job.