Sage Barnaby never asked for this soulless and friendless existence, but despite being unwelcome, the darkness found her and made her its companion. When her sister fell sick Sage became desperate, so she turned to the one malevolent thing that could reverse her sister's fate, but she was cheated. In a final effort for redemption, Sage summons her guardian angel, which just happens to be the most beautiful and arrogant creature in Heaven and Hell. They embark on a grim and twisted journey to uncover a sacred object that might have the power to save her soul. Sage and the angel face a series of challenges that test their loyalty and their morality, and together, they come to discover that their quest decide more than Sage's fate alone. Sage Barnaby gave up everything to save her sister, but she died anyway. Now she has nothing left to lose, and that makes her very, very dangerous.