When a stagecoach guard tries to warn a town of an imminent raid by a band of outlaws, the people mistake him for one of the gang.

Once the commanding officer of a cavalry patrol is killed, the ranking officer who must take command is an army doctor.

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…