A year after a violent train robbery the Pinkerton detective agency hires a bounty hunter to find the three remaining killers. He tracks them to Twin Forks but has no clue to their identity. Tensions surface as just his presence in town acts as a catalyst.

As a result of nuclear testing, gigantic, ferocious mutant ants appear in the American desert southwest, and a father-daughter team of entomologists join forces with the state police officer who first discovers their existence, an FBI agent and, eventually, the US Army to eradicate the menace, before it spreads across the continent, and the world.

A New York sculptor who opens a wax museum to showcase the likenesses of famous historical figures runs into trouble with his business partner, who demands that the exhibits become more extreme in order to increase profits.