Amber Tambourine is a sad, lonely little girl who has moved far away from her friends. Then one day, she and her doggies, Bandit and Roxy, encounter a polka dot rainbow. Suddenly, they find themselves in the Land of Laugh-a-Lot, where people are happy - ALL THE TIME! They laugh, they play...then they laugh some more. In no time at all, Amber makes many new friends and is happy once more. But this poses a dilemma: Amber knows she must return home, but if she leaves, will she ever be able to find her way back?