In ancient times, Satan was defeated by the gods in the War of Armageddon and was sealed away deep within the earth. But in the modern day, Satan once again aims to control all the universe - and towards this aim, his Devil Siders have begun to act! But now the child born between the worlds of gods and demons, Reiki Kikoku, has joined forces with the God Siders to destroy the demons!!

Yosuke Ejima and his wife Keiko are visiting Mexico to research ancient civilizations. Their bus is heading for the Teotihuacan ruins when they suddenly get involved in gang related violence. Can they survive...?!

Yosuke Ejima was gravely injured in a bus hijacking incident involving the mafia. He inherited the power of the Aztec priests to “rip hearts out” and resurrected as a special A-class assassin. By using this power, Yosuke took his beloved wife back from the mafia and should have been living a happy life, but...?!