Since her mother's death ten years ago, Isadora has lived under the thumb of her father, the all-powerful Eli St. James. Branded as crazy and confined to the house, no one believes her when she tries to tell them the real reason behind the wounds that appear on her body, the way she is always falling down or crying out in pain.
Everything changed the night Lyla Evans stumbled into her attic. After finding a moment's peace in Lyla's presence, Izzy is determined to escape. Escape her father, escape the strange, flying 'friends' he brings into the house and find Lyla, her salvation. When she finally reaches Lyla, however, Izzy finds more questions than answers.
Before she realizes it, Izzy is agreeing to go back into her father's house as a spy, to find out what his master plan is. To learn the secret of her mother's death, the reason behind her strange past, the meaning of faith in God, and the reason for the whisper of memories in the back of her mind about the mysterious Fallen who seems so set being what she's never had; a protector.