Once our world was full of dragons who lived in harmony with humans. But after a group of rogue dragons, the Raptors, tried to take over Earth, all dragons were banished to another realm. Sirin becomes the first child to lock with a dragon in centuries -- forming a deep friendship unlike anything she's ever imagined. But Sirin learns that not all dragons returned with good intentions, and soon she finds herself at the center of a battle between the dragons who want to protect the humans . . . and those who want to destroy them.