Prince Cyril has been content spending most of his young life inside his castle, making up stories about mythical creatures and living in his own imagination. But when his parents request that he receives an education, Cyril quickly discovers that life outside the castle walls is far more exciting, and dangerous, than he could ever have imagined. Thrown into a world of troublemaking monkeys, mythical creatures, giant reptiles and other strange beings, Cyril and his newfound friends soon learn that they are more alike than they realise, and that the only way to save their home from disaster is to work together.