While the Civil War rages on between the Union and the Confederacy, three men – a quiet loner, a ruthless hitman, and a Mexican bandit – comb the American Southwest in search of a strongbox containing $200,000 in stolen gold.

Stodge City is in the grip of the Rumpo Kid and his gang. Mistaken identity again takes a hand as a 'sanitary engineer' named Marshal P. Knutt is mistaken for a law marshal. Being the conscientious sort, Marshal tries to help the town get rid of Rumpo, and a showdown is inevitable. Marshal has two aids—revenge-seeking Annie Oakley and ...

After the train station clerk is assaulted and left bound and gagged, then the departing train and its passengers robbed, a posse goes in hot pursuit of the fleeing bandits.

With the help of an irreverent young sidekick, a bank robber gets his old gang back together to organise a daring new heist.

Three of the original five "young guns" — Billy the Kid, Jose Chavez y Chavez, and Doc Scurlock — return in Young Guns, Part 2, which is the story of Billy the Kid and his race to safety in Old Mexico while being trailed by a group of government agents led by Pat Garrett.