Animated seasonal adventure set entirely to the music of Tchaikovsky's 'Nutcracker'. It is Christmas Eve and Katya has been sent to bed early. When the clock strikes midnight, she wakes up and is overjoyed to discover that all her toys have come to life. However, her fun is stopped short when the evil Mouse King arrives on the scene, ready to ruin Christmas with a dastardly plot to steal all the sweets. Can Katya and her toy friends band together and find a way of saving the day?