During the nineteen-thirties and forties, a masked warrior nun waged a solitary crusade against the forces of evil that ran rampant throughout the world. She was known only as the Crimson Nun. These are her adventures...

Areala, the "Angel of War" walks the Earth again! Sister Shannon Masters has given herself over to Areala, taken her name, and become her earthly vessel... her avatar! Empowered by the "Angel of War" to defend the Vatican from threats both human and supernatural, Areala finds that she must first defend herself from her superiors. Assailed from one side by the Vatican bureaucracy and from the other by the evil that would destroy it, Areala must use all her strength and willpower to perservere. Meanwhile, an ominous, clandestine force orchestrates a sinister plot... can even the Vatican's venerable Magic Priests uncover its purpose?