Two towns, Tralee and Tralah, compete in an annual St. Patrick's Day decorating contest which Tralah boastfully always wins, but when their hearts are put to the test by a little man with pointed ears, Tralee wins with no effort at all.
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.