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.

Shannon has been practicing for the local St. Patrick's Day step dancing competition, but worries about her homemade dress and second-hand shoes until she summons a very unusual leprechaun, hoping that he can help her do well.