Princess Tabitha and her caticorn, Bertie, embark on a magical journey to rescue the Rainbow River. A grumpy cloud is blocking the sun from reaching the Rainbow Waterfall, causing the river to lose its colors. With the help of her friends Emma Elephant, Haya Hedgehog, and Sofia Swan, Tabitha teaches the cloud the importance of rain and brings back the sparkle, proving that everyone is special in their own way.