Kleo is summoned by Talbut to meet Justin The Strong, a fellow unicorn, in medieval Europe where she will discover a young squire, Marcus, who is training to become a knight. When Kleo arrives she finds Marcus with a group of other squires hunting a fox under the guidance of Marcus' father, Orsin The Huntsman. When the time comes for Marcus to net the fox he cannot find it in his heart to capture the beautiful wild creature, and his compassion is mistaken for cowardice. Marcus is taunted by his fellow "brave" squires, Orsin hangs his head in shames. Marcus states he will show he is no coward. Indeed, he says he will leave and not return until he has captured a dragon.
Marcus despair leads him to Misfitland where Kleo convinces Lyle, the un-fierce dragon to act fierce and let Marcus capture him. This, Kleo reasons, will help Marcus to feel better and to be able to return to his home proud.
Lyle agrees. However, to become fierce Lyle eats chocolates. Unfortunately he eats far too much chocolate and temporarily turns into an entirely out of control ferocious dragon. Lyle flies through the sky of Misfitland, belching fire and finally, fortunately, he crashes heavily. Marcus i