Sky Stallion is the sequel to Cloud Filly and is an exciting fantasy adventure about a teenage boy (Drake) and his sister (Nellie) who live in a new land that they encountered by accident. They discover unicorns, which are much different than they ever imagined, and many mystical creatures such as fire horses, dragons and cloud unicorns. They are befriended by two sisters, one a mysterious sorceress. The adventure expands on the friendship between Drake and a wild, playful and independent unicorn filly (Cloudberry) and their love of racing. The focus is on Nellie's carefully forged friendship with the evil and unpredictable unicorn stallion Nightcloud. She sees through the evil side and is seduced by his great beauty and strong spirit while developing a friendship.