Ripped from an orphanage for her wicked ways, Thea was trained as a seductive assassin for the nuns of the Hildegard Sisterhood and given a purpose as a Sinner: to bring balance to a world designed by men. She never expected to be brought to her knees by the arrival of an arrogant scholar from the all-male Team Saint. Wesley is a relentless demon hunter for the most mysterious entity in the world-the Vatican. His mission is simple: destroy evil wherever it may hide. But when he meets the sassy and smart Thea, he can't resist falling into temptation. She's the one he's searched for his entire life, but she belongs to an organization he's sworn to destroy. Danger, deception, and desire collide when they discover a lost prophecy has the key to saving a loved one in each of their lives-but it will only work for one.