Hell is empty and all the demons are at Ravenswood Academy . . .

Mourning the sudden death of her sister, Andy Emmerson knows she must come to terms with a life without Violet. But on the day of the funeral Andy is shocked to discover one thing: the person in that casket is not her sister.

Violet is alive.

Convinced her sister's elite boarding school is covering up the truth, Andy enrols at Ravenswood Academy to discover what really happened and find Violet.

The school is as beautiful and haunting as the students within it and Andy learns that it's not just good grades that drives these pupils. Something much darker is at play.

After discovering a cryptic note from her sister, Andy must follow a set of clues to unlock the truth. This will bring her into contact with secret societies, ancient magic, demons and monsters. And a charming senior named Jae Han who has his own reasons for finding out what happened to Violet . . .

Soon Andy realises the price she must pay to bring her sister home is darker and more dangerous than she ever could have imagined.