Modelling themselves after an idyllic cookie-cutter suburban 1950s family, a colony of insects move from South America into the United States with the intent of getting access to the nation's nuclear resources.

A thousand years ago, the Leprechaun left a bloody trail when he ripped through the countryside in search of his stolen gold. Now he's back in the big city using all of his deadly tricks to snare the girl of his nightmares. His bloody quest becomes more deadly when her boyfriend steals one of the Leprechaun's gold coins. The town soon discovers two dead bodies and a trail of gold dust leads them to the Leprechaun's lair.