Nine year old Molly and her father, (Tim Matheson) move to ireland to a house they've inherited nicknamed "Misfortune Manor". It brings bad luck to anyone who lives in it, and Molly and her father soon fall victim to the curse: they will lose their new found home unless they can pay the taxes they owe on it.
When Emily Woodrow and her friends happen on a treasure chest full of gold coins, they fail to to heed the warnings of a wise old psychic who had foretold that they would encounter trouble with a very nasty and protective Leprechaun.
On a planet in a distant galaxy, a power hungry Leprechaun, holds a beautiful alien princess hostage in order to marry her for her royal title. With her title and his beloved gold, he'll be able to rule the universe. While making his maniacal plans, what he doesn't count on is an invading platoon of marines from Earth, to save the princess and foil his plans. An accomplished trickster, the Leprechaun stows himself away on the orbiting spaceship and wreaks havoc on the crew in an attempt to recapture his bride.
It was a normal night in Las Vegas, Nevada, all the lights were flashing brightly, until a man with one hand, one eye, and one leg walks into a pawn shop with a statue of a hideous looking Leprechaun. The owner claims it's a good luck charm. The statue also wore a medallion around it's neck. The careless pawn shop owner took off the medallion setting the Leprechaun free...
When Butch, Postmaster P, and Stray Bullet loot the local hip-hop mogul's studio to fund their demo album, the threesome unwittingly ends up with the secret of Mack Daddy's success: a magical flute. Their gigs instantly turn golden but a blood-thristy Leprechaun and an angry Mack Daddy are hot on their trail, leaving a wake of destruction tainted by politically incorrect limericks.
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.
A horrific Leprechaun goes on a rampage after his precious bag of gold coins is stolen. He uses all of his magical destructive powers to trick, terrorize and kill anyone who is unlucky enough to hinder his relentless search. In a frantic attempt to survive the wrath of the Leprechaun, Tori and her friends scramble to find the only weapon known to kill this Irish monster...a four-leaf clover.