D Day almost ended the world. Thousands of people across the world became posessed by demons, tearing civilization to shreds. But from the fallen came the exorcists, humans with powerful bodies and magical weapons. With their help, humanity clawed civilization back from catastrophe. However, a decade later a kappa in New York robs a bank, leading exorcist Harry Vickers on a quest to Japan where old friends and enemies wait. The mystery Harry unravels will make him question why a man like him lived to be called a hero, why others choose to bond with demons and why D Day happened at all...and if it could happen again.