Teresa Amadei is a young stylite, a wandering, ascetic demon hunter, trained in the Way of Fire. Her teacher, Father Simon, a Byzantine martial artist monk, sends her on a journey to the city of Alexantine in the Midwestern US, where many are moving to escape the growing chaos in the world. Along the way she stops at towns and cities and battles the Daemoklos, demons who have escaped from their prison, to seal them away by writing them back into their eponymous grimoire. She is aided by her older cousin and fellow stylite, Matthew Abbate, and crosses paths with the mysterious black knight, the Saracen, with his own agenda.