Her power can save humanity, but her love for her guardian angel might destroy it. Faith Blackwell gave up her life as she knew it to protect her demonic father from getting sent to Hell by the angelic army. Forced into hiding under the protection of Ezekiel, her irresistible guardian angel, Faith fears the consequences their soul-deep connection has on his purpose in the universe. The last thing she wants is for an angel to fall from grace, but keeping her demonic half buried inside her proves harder than she imagined. When a pack of hellhounds moves into her neighborhood and threatens to bring Heaven's highest ranking and Hell's most loyal to her doorstep, Faith realizes hiding with her guardian isn't how she wants to spend the rest of her mortal life. A powerful witch and her ruthless pack of Hell beasts have a greater plan for the universe, and Faith can't watch the destruction of humanity without trying to help save it. Putting her eternity on the line, Faith uses her demonic blood to draw out the witch to try to stop her from unleashing Hell onto the world. But the kind of power Faith must gather comes at a price she can't afford to pay-one that will leave her inner demon as her last possession.