The three stooges pursue a notorious burglar in order to pay past due notes to the Skin & Flint company and save their tailor shop.

An outlaw gang is trying to stop the reopening of a mine as they look for the money left there by the famous outlaw Dusty Morton. After a ten year absence, Morton has apparently reappeared and Steve arrives looking for him. He finds his son who also wonders if his father is still alive. With the gang soon after him, the Durango Kid goes into action and Steve tries to learn who the real Dusty Morgan is.

The stooges hope to collect a reward by proving to a museum that cavemen still exist. They return from their expedition with a film purporting to show some stone age stooges defending their women from other cavemen. The museum curators are about to pay they reward, until they overhear the stooges talking about how they faked the film, with themselves playing the cavemen.

Set in the stone age, the stooges are cavemen who must have various misadventures hunting, gathering, and otherwise coping with prehistoric life. When some other cavemen threaten to take their women ("Aggie", "Maggie", and "Baggy"), the boys fight them off with a catapulting tree branch that shoots rocks and eggs.