Having been falsely court marshaled for cowardice and sentenced to prison by the Army, Jed Kilton escapes and heads to Nevada Springs to see his kid brother. There he meets his old school friend Sam Ballou. But the two old friends soon find themselves on opposite sides and Sam has Jed arrested. Then when Jed's young brother sees one of Sam's men kill another man, the boy becomes Sam's intended victim.

An English refugee and a street thug go to military school together.

On vacation at his ranch, western actor Roy quickly finds himself involved with a horse rustling operation and a boy ward of one of the rustlers, leading to the kidnapping of Roy's trick horse Trigger by the gang with a demand for ransom.

Chuck Wheeler gets out of the Pen and sets up an elaborate heist of Vegas casino money travelling by armored truck. He enlists the help of shady club owner Joe Darren and his ex-cellmate's wife, Vi. Vi's husband Mike is a trigger happy and jealous hothead and will not grant her a divorce. Mike escapes from prison right before the armored truck job goes into motion and promises trouble as he tries to locate his associates and his wandering wife.

A teenager lands in a brutal reform school for refusing to squeal on his bootlegger boss.

A university chemistry professor experiments with an ancient Mayan gas on a medical student, turning the would-be surgeon into a murdering ghoul as part of a plan to steal his lover.

A scientific expedition happens to discover that gold exists on Tarzan's escarpment. The villainous Medford and Vandermeer kidnap Jane and Boy to extort from Tarzan the location of the gold.