When Chen Ge woke up in the strange "Happy Apartment", a piece of rules paper written in blood became his only way to survive.
However, behind the rules lies completely opposite instructions.
Which sentence is true, "Don't open the door after dark" or "Please look through the peephole when there is a third knock on the door", which one is false?
Outside the door, there is a two-tailed black cat wandering to kill, the "enthusiastic" neighbor sends an invitation with a hoarse voice, and there is also a terrifying "administrator" who patrols on time at midnight to clean up the "trash".
Every choice is a matter of life and death, and every detail may be the key to survival.
When Chen Ge awakens the ability to discern the truth, can he break through the layers of puzzles, find the real hope from the "happy milk" provided by his "mother" and the neighbor's strange knock on the door, and escape from this desperate apartment that will never see the light of day?
