Brian, visiting his Irish relatives for the first time, tries to prove to his skeptical great-aunt that his great-grandfather's tales of Irish lore and leprechauns are true.
When Roy G. Biv, a leprechaun, appears and asks Colleen's help in saving the St. Patrick's Day parade, she offers items of different colors to rebuild his lost rainbow, but is reluctant to part with a special gift from her grandfather.
Two teenage cousins, one Irish, the other from the United States, set out to find a magic doorway to the Faraway Country, where humans must bow to the little people.