When Piper discovers an old antique mirror on the attic of her new home, she has no idea what terror she unlocked. Eerie shadows lurking in the night and estranged voices crying out for help are only the beginning. As Piper's world comes crumbling down, she realizes everything that she believed was imaginary, might have been real all along. Something is very wrong with that mirror. And if she doesn't find out what, the mirror might end up killing her. With some help of old and new friends, Piper tries to get to the bottom of the mystery. One thing is for certain: the mirror preys on the guilty. But what exactly is she guilty of?