"A leprechaun and the Easter Bunny fight over the same turf and over whose holiday should take precedence"--

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.

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.

When leprechauns Ari, Boo, and Col need to place the pot of gold at the end of the rainbow, they cannot help getting into mischief along the way.