Nineteen-year-old Emily's acute dissociative disorder causes her to be institutionalised—again—at Greyfriars Reformatory for Girls. Caught in the crossfire between brutal Principal Quick and cruel bully Saffron Chassay, Emily befriends fellow outcast Victoria.When the terrifying apparition of the mysterious "e;Grey Girl"e; begins scaring the inmates to death, Emily's disorder may be the one thing that can save her.