After death of people and animals, their souls enter hell, cross Naihe Bridge, drink Meng Po soup, and enter reincarnation. Some souls do not want to enter reincarnation and stay by the Naihe Bridge. As more and more souls are left behind, some souls swallow up other souls and become stronger. These souls are called evil spirits by humans.
Evil spirits need to attach themselves to people or animals with the same soul as themselves. To feed on the souls, they need to kill constantly.
There are always people carrying a heavy burden forward.
On the edge of the bustling and noisy city, there is a secret corner hidden in the city - a special mental hospital. It is not only a haven for the spiritual world, but also a strange place where superpowers and supernatural forces meet.
