On a planet in a distant galaxy, a power-hungry Leprechaun, holds a beautiful princess hostage as a way to marry her to her royal name. With her name and his gold, he will be able to rule the universe. While building his plans, what he does not depend on is the invading platoon of marines from Earth, foil his plans and to rescue the princess. A accomplished trickster, the Leprechaun stows away himself and wreaks havoc to recapture his bride.