A river runs to the sea, and another to the sky...Sixteen-year-old Ama only knows the Mountain, a subterranean web of caves where her people have lived for generations. Their sole source of water and life comes from the Pearl, the magical heart of the Great Dragon. It is Ama's lifelong dream to join the keepers, the mysterious women who tend to the Pearl, but she soon learns it is not what she expected. Camden's got a dream of his own: to prove himself as a hotshot fighter pilot for the Coalition Air Force. His first campaign on an aircraft carrier is just a routine weapons test, but that won't stop him from making a name for himself. Somehow.Both teens soon find themselves questioning everything they've been told as a fated collision of opposing forces threatens to destroy both their worlds.