This is a world with ghosts and practitioners. The gods in heaven control the destiny of life, and the ghosts in the underworld control reincarnation after death. However, a war between gods and underworld thousands of years ago disrupted the original rules. A lonely shadow wandering between the world and the underworld, a spiritual fireman who travels through all walks of life in search of answers. With Shadow's help, Pyro's ignorance and stupidity at the beginning made the two different creatures gradually gain trust. Until another hundred-year calamity comes in Feng Wu...