Cassie, the dragons, Emmy and Max have been playing an ill-advised ball game in a grove of trees. Cassie didn't want to play there becuas they could lose ball. It does indeed get lost, in the belly of a beast called a Dragonocerous. Pretty soon, everyone else except Cassie is stuck inside too. She has a great idea for getting them out, but finds herself giving in to trying everyone else's solutions for the problem.