Once upon a time, a young prince lost his smile.

It seemed nothing would make Prince Donald smile, not songs from the musician or cakes from the baker. The court magician tried to make a new magical beast for the prince, but it was so frightening he let it go. Still determined to help Donald, the magician's granddaughter, Hana, invents a majestic creature with the body of a horse and the horn of a gazelle, and calls him 'a unicorn'.

Hana and Donald playfully chase the unicorn through the forest, and it seems that this magical animal might hold the key to the prince's smile. But then they discover a darker beast, lurking in the trees...

This is a sparkling origin tale from the creators of The Treasure of the Loch Ness Monster.