In the small American town of Orton Creek, David Farmer is accidentally killed by Don Curran, son of town tyrant Will Curran, during a fraternity initiation. The frat boys frame electronic parts salesman Frank Govers for hit-and-run but determined newcomer Sheriff Ralph Baker and his love interest Jo Westlake seek the truth. Govers and girlfriend Lee Ann Hadley hide in a hunting cabin and are captured by prison escapees Mick August and Merlin Wells (who is tricked by Govers into electrocuting himself). August tries to claim the bounty on Govers from Will Curran but Sheriff Baker is only one step behind.

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.