A brutal war between demons and humanity has raged across Europe for over a century. At its heart are two elite soldiers: Selene Alleva, a powerful exorcists trained at the prestigious Vatican Academy, and foot soldier, Jules Lacroix, unrivalled in battle. When their paths cross, despite initial distrust - then unwelcome attraction - Jules and Selene discover a terrible secret at the heart of the holy Vatican City. Soon Jules is forced to question everything he's ever known - including himself. And Selene, unable to ignore her growing feelings for Jules, must make an impossible choice between love and duty.