Three things have the power to destroy the Secret Country: the Border Magic, the Crystal of Earth, and the whim of the dragon. The cousins have faced the first two; now they face the third. The Country's most trusted counselors know that the five are impostors, but no one knows who has been playing with their destinies. They must find and speak with Chryse the unicorn and Belaparthalion the dragon in order to learn the truth.
For the past nine years, cousins Patrick, Ruth, Ellen, Ted, and Laura have played at "The Secret"-a game full of witches, unicorns, a magic ring and court intrigue. In The Secret, they can imagine anything into reality, and shape destiny. Then the unbelievable happens: by trick or by chance, they find themselves in the Secret Country, their made-up identities now real. They have arrived at the start of their game, with the Country on the edge of war. What was once exciting and wonderful now looms threateningly before them, and no one is sure how to stop it . . . or if they will ever get back home.
The five cousins are still trapped in the Secret Country, and must play their parts. When the King is poisoned, Ted-Prince Edward-must take the throne, even though he has no idea how to rule a country, battle magic, or inspire followers. Soon enough he will have to do all three because the Country is on the verge of war with the treacherous Dragon King.