It's been eighteen months since the Raxter School for Girls was put under quarantine, since the Tox hit and pulled Hetty's life out from under her. When Byatt goes missing, Hetty will do anything to find her, even if it means breaking quarantine and braving the horrors that lie beyond the fence. And when she does, Hetty learns that there's more to their story, to their life at Raxter, than she could have ever thought true.