"How far can a man go in the name of faith?" Father Gareth De'Aubyn is a man tormented by his past, and ready to sell his future to save the souls of his flock. He's traded his Crusader's armor for a cassock, and now ministers to the very people his army sent fleeing for their lives. When his church is attacked by unknown assassins, Gareth is mortally wounded, and with his dying breath, he calls out to the Creator for help. "But his god does not answer." Instead, a demon heeds his call, cajoling him to promise his soul to the Sunderer, god of the underworld, for a chance to set everything right. Fydelis was once an angel. Gareth's Guardian Angel. But his love for Gareth caused him to be cast from the heavens, and the Angel of Fidelity has become the demonic aspect of Regret. He is now the unwilling plaything of the Sunderer, the darkest of all dark gods. Seeing his Crusader again-a man he thought had abandoned him- is more cruelty than he can take. Fydelis, now a stranger to Gareth, is sent to the mortal world to make the dying priest an offer he can't refuse, and in return, Gareth is tasked with the collection of some very stubborn souls. Together, they begin a journey that will test everything they thought they knew about faith, love, and fidelity.