In order to make money, the male protagonist Chen Yang moved into Room 704, an abandoned old residential building with extremely low rent. From then on, he was involved in a Yin Ling massacre that lasted for decades.
While surviving, he uncovered the secrets of the old building:
Every floor, every household, and every deceased tenant in the building has a tragic past.
The entire building is a "soul-nurturing container" left in the underworld in the human world, and he is the chosen "building keeper".
