Zog is a keen young dragon who wants to learn to fly, roar, and breathe fire, so he studies at the Dragon School. He is desperate to impress his teacher and win a golden star, but he is prone to accidents and he has to be helped by a kind young girl who patches up his bumps and bruises.

Pearl and Gadabout are now a flying doctor trio, caring for creatures including a mermaid, a unicorn and a sneezy lion. However when bad weather forces them to land at the palace, Pearl is locked up by her uncle, the king.