An earthquake unleashes giant, nearly impossible to kill, slow moving, fire starting roaches on a small Californian community. Researcher James Parmiter (Bradford Dillman) is the first etymologist to figure out what the bugs are: an ancient, subterranean species slowly being killed by the bends and unable to breed. When his wife Carrie (Joanna MIles) is burned to death in a blaze caused by one of the creatures, Parmiter loses his last connection to humanity and retreats to an abandoned farm to attempt to "keep them alive" by cross-breeding the subterranean species with a house roach. Will he come to his senses before it's too late?
