Santa overslept, causing his rival, the Sun, to melt the North Pole. In wandering his bare workshops, Santa finds a discarded and defective wooden toy horse that had been poorly carved many years ago. An unlikely heroine is born to fight the battle against the scorching heat of the sun when Mother Nature brings the toy to life! The heroine leads the attack at great personal risk to herself, and she nearly dies. She is eventually restored by various North-Pole helpers, some of whom seem useless or scary, but there is a place and use for every creature in the world. Discover what fate the heroine ultimately chooses in Santa Slept In: How Rainbow saved Christmas!