Don't get involved. Never get attached.
These are the rules seventeen-year-old Ema has created to survive a foster system designed to crush her. These are the only rules Ema won't break.
When thoughts and emotions from other people start intruding in her mind, Ema has to face the realization that she has psychic powers.
As her abilities grow, so do her questions... and memories of parents she's never known haunt her dreams.
With visions of angels and demons plaguing her, she has to decide if her rules are inviolate, or will she let innocent people die to keep them?