Grace's family are wardens of the Griffin map, using its teleport technology to help people and fight crime across the land of Moreland. Although Grace is still too young, she longs to go on missions herself. After all, if her brother, Bren, can do it, why can't she? So when Grace finds herself alone with the map as a distress call comes in, she jumps at the chance to prove she's up to the task. But the map transports Grace to a remote village were nothing is quite as it seems...has she taken on more than she can handle?