A rogue scientist near a small desert town arouses the suspicion of the town's doctor when his lab assistant is found dead from a case of acromegaly, which took only four days to develop. As the doctor investigates, aided by the scientist's new female assistant, they discover that something is devouring local cattle and humans in increasingly large quantities.

John Agaras Dr. Matt Hastings
Mara Cordayas Stephanie 'Steve' Clayton
Leo G. Carrollas Prof. Gerald Deemer
Nestor Paivaas Sheriff Jack Andrews
Ross Elliottas Joe Burch
Hank Pattersonas Josh
Eddie Parkeras Paul Lund / Eric Jacobs / Airport Workman
Bert Hollandas Barney Russell
Raymond Baileyas Dr. Townsend
Steve Darrellas Andy Andersen