When Lily and her family move in with her sick grandmother, a magical tiger straight out of her halmoni's Korean folktales arrives, prompting Lily to unravel a secret family history. Long, long ago, Halmoni stole something from the tigers. Now they want it back. And when one of the tigers approaches Lily with a deal - return what her grandmother stole in exchange for Halmoni's health - Lily is tempted to agree. But deals with tigers are never what they seem! With the help of her sister and a new friend, Lily must find her voice ... and the courage to face a tiger.