Wisherton is surrounded by a Wasteland filled with terrifying Herders. Sevra Say has lived twelve years grateful for the giant wall that keeps Wisherton safe. But now her life is threatened by something inside Wisherton, something that makes her believe getting past the wall may be the only way to save her family. With the help of her three siblings, Sevra will embark on an impossible quest and come face to face with what lies beyond Wisherton.