A strange spider from the depths of a jungle is accidentally transported back to the good old US of A. Through numerous coincidences and accidents, it finds a home in the Doctor's new home (well in the barn). After mating with a local spider, thousands of little spiders run riot in the small town. This wouldn't be too much of a problem, except that these "aren't ordinary spiders"; they're killers. The local pest exterminator has a go, but.. So it's down to the Doc' to save the town.