In the shadow of the bustling city, stands an old residential building called "Grey Tower". The rent here is ridiculously cheap, and the residents are more or less "weird". Lin Mo, the new courier, just wanted to find a cheap place to stay, but soon discovered that no one in this building was an ordinary person. The whispers at the end of the corridor, the non-existent floor where the elevator stops automatically at midnight, and the mysterious landlord who is always collecting old things... A series of strange events dragged him into the whirlpool. When daily life in a residential building becomes a test of survival, Lin Mo's own buried secrets gradually come to light.
