Two years ago, Mercy Manning was the sole survivor of a car crash that killed her parents. The officials called it a horrible accident. Mercy knew the truth. She saw the demon attack. Now 18, Mercy spends her days and nights staring at walls in Southern Psychiatric Hospital, willing the visions of all things terrible and supernatural out of her mind. When the new nurse with the beautiful dark eyes introduces himself as Sumner, Mercy thinks he’s nice enough. Until Sumner attacks. The last thing Mercy see are Sumner’s dark eyes turning red. When she wakes, another man is in her room. Someone who claims to be an angel named Ramsey. Someone or something is killing guardian angels one by one. A single angel must now protect thousands of people, and thanks to orders from his superiors and the demons’ intrigue with Mercy, Ramsey gets to protect her—constantly—much to his agitation. Caught between a war between good and evil, will Mercy be able to fight for her life, or will the demons, including Sumner, use her very specific “gift” for their own benefit?

Eighteen year old, Mercy Manning, knows angels and demons are real. She's seen them, talked to them—trusted her guardian angel, Ramsey, to protect her. She TRUSTS Ramsey... ... until the demon, Sumner, gets inside her head. Doubts get planted. Old pain resurfaces. And Mercy has to decide who to trust: the grumpy angel who is forced to be be with her or the compassionate demon who whispers in her mind, telling all of Ramsey's dark secrets.