A mutilating knife-killer haunts the small Southwest-desert town of Mescal. Though most victims have been prostitutes, the first was none other than Travis Mescal, the only son of the town's first family. When the Sheriff proves unable to solve the case, the town leaders invite Investigator Burns to unravel the mystery.

Rancher Cole Hillman is fed up of rabbits plaguing his fields. Zoologist Roy Bennett conducts an experiment to curb their population, but it gives rise to giant rabbits that terrorise the town.