After people and animals die, their souls enter the underworld, cross the Naihe Bridge, drink Granny Meng's soup, and enter reincarnation. Some souls refuse to be reincarnated and remain beside the Naihe Bridge. As their numbers grow, some souls devour others and become more powerful. Humans call these souls evil spirits.
Evil spirits must attach themselves to people or animals with souls like their own, feeding on their souls and forcing them to kill again and again.
There will always be someone who bears the burden and presses on.
On the edge of a city where prosperity and clamor intertwine lies a hidden, secret place: a special psychiatric hospital. It is not only a sanctuary for troubled minds, but also a strange crossroads where psychics and supernatural forces converge.
