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. Most humans forgot about the dragons, claiming they never existed. Eleven-year-old sirin knows the truth -- she grew up with stories passed down through the generations. However, when her mother falls ill, even sirin has trouble believing in magic... Until she sees a mysterious streak of silver in the night sky. 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.