Dr. Ayanokoji admires his creation - An Angel Heart Prototype Code Mark II named Kurumi. This experiment of his is the result of his efforts to save the world. Meanwhile, Nakahito is coerced into entering a mad doctor's mansion that supposedly has the detached living head of a dissected woman in the basement. The eleven-year-old Nakahito is drafted by his peers because he comes from a family of mystics, those who practice the Onmyou way. Dr. Ayanokoji, Kurumi and Nakahito are about to cross paths for the first time in a dramatic way.
Nakahito, un jeune apprenti prêtre shinto, est entraîné par des amis peu scrupuleux dans la propriété du Docteur Ayanokôji. Bien malgré lui, il se retrouve à visiter le laboratoire de celui que l'on nomme "le savant fou"...
El Dr. Ayanokoji admira su creación: un Angel Heart Prototype Code Mark II llamado Kurumi. Este experimento suyo es el resultado de sus esfuerzos por salvar el mundo. Mientras tanto, Nakahito es obligado a entrar en la mansión de un médico loco que supuestamente tiene la cabeza viva separada de una mujer disecada en el sótano.
