Thousands of years ago in another kingdom, there was a great battle between the forces of good and evil. She stayed behind to serve the king. He followed Lucifer and was cast out of heaven. Distance and loyalties come between the guardian angel and the fallen angel, but there was one thing time couldn't destroy. Despite the fact that Sonya watches over human souls and Nimbus seeks to ruin them, neither one has ever stopped loving each other. But angels and demons are forbidden to mate. Frustrated that Sonya resists his wiles despite her obvious need for him, Nimbus employs his soul devourer friend, Jude, to help him trick the dark-haired beauty into losing her soul. Devastated that her compassion was used against her, Sonya finds herself trapped in a world of demons and vampires where humans are made into sex submissives and reduced to little more than objects. She teeters back and forth between reluctance and acceptance, between resentment and lust. Sonya seeks to escape and somehow find redemption for her betrayal, but Nimbus vows to break her until she worships him alone. Through punishment, humiliation and twisted sexual acts he seeks to destroy her angelic nature until he subjects her to the greatest sin of all.