Darkness has never been so tempting... The warrior angels of Heaven are stuck in the captivity of Lucifer; the deadliest Fallen angel in existence. In order to free the warriors, Sandriel, a Light angel, is sent from the heavens to negotiate a deal with the Dark One. The encounter with Lucifer triggers a flood of memories of her past human life as Nadia, a young village girl whom Lucifer had saved from a demonic assault prior to his fall from Heaven. As Sandriel struggles to understand her connection to Lucifer, she is captured and taken to his realm in Hell. Forced to rely on her intelligence and strength of will, she discovers rare abilities that could save her from Hell's denizens and the rest of the Fallen angels who are determined to destroy her. Soon, she realises Lucifer has more up his sleeve than she bargained for. After all, they do say that nothing good comes out of a deal with the Devil. And Sandriel is just coming to know how right they really were.