Willie Locke finds something amazing inside Cavendish Manor. An ancient door and a mysterious chest send her on a race against time. With her brother and best friend, she enlists the help of a bold warrior who helps them on a quest for Eighty-Six lost keys. Without the keys, the hidden world of Pymm will die and take Earth along with it. And there's a catch, the keys don't want to be found. To get back home, they must hunt terrifying beasts, uncover hidden secrets, traverse an alien land and embrace a destiny that has been awaiting them for a thousand years.