The leprechaun is a very small mythical person who lives in the grasses and marshes of Ireland. A mischievous troublemaker, he likes to sneak around and make himself at home.

On one special St. Patrick's Day, the leprechaun visits the house of a family in the United States. He hides beneath a chair and plays tricks along the way. Then, when he decides to take a nap in someone's bed, some treats fall out of his cap and get left behind for the children to enjoy. Meanwhile, there's a rainbow in the sky outside; maybe there will be a pot of gold left there at the end for someone in the family to find. And when the day is done, the leprechaun makes his way back to Ireland, where he'll stay until the next St. Patrick's Day.