Two children from New York, Jenny and David, go with their mother to spend a long weekend with their grandparents in Canada. There, they encounter an invisible being, Fritz, who has had his gold stolen by a dastardly barkeeper named Flannigan. The gold has magical powers and Fritz must get it back. The children journey with Fritz through the rainbow, to the Great Land of the Small, where they meet some very strange and interesting characters and get into a lot of trouble. A tale filled with humor, special effects and magical enounters...and all's well that ends well.