The world that the former monk Thomas Neville knows is crumbling about him. The Holy Mother Church of Rome is losing its power and men are coming to question the nature of religion and the role of those who rule them by sword and cross. Thomas knows that it is not merely the dawning of a new time for men to try to think and judge for themselves but it is a direct result of the rift in the fabric of the world, where demons have escaped their prison and are trying to breach the very gates of heaven. The great archangel Michael gave Thomas the task to find the demons who now dwell in human form and expose their evil natures. To accomplish this he had to turn his back on one set of vows and return to his once lofty noble connections. In doing so, his life is caught up with his childhood friend Harold Bollinbroke, the fair young "Prince Hal"--who might be more (or less) than he seems.