There have been a series of bizarre coma cases in City A, with mysterious door-shaped blood marks carved on the hearts of the deceased.
When the calm and rational forensic doctor Bai Yu'an dissected a strange corpse, he discovered that golden particles appeared in his blood. On the same night, the rebellious detective Jiang Lin broke into his autopsy room. The thorn tattoo on his neck was bleeding beads - the pattern was exactly the same as the door-shaped mark on the corpse.
On a rainy night, the two people in front of the bronze mirror were dragged into the world inside the "door".
**Rule 1**: The house number is the order of death.
**Rule 2**: The real room must be found before midnight.
**Rule 3**: Don't answer the paper man's questions.
When Bai Yu'an's golden blood blended with Jiang Lin's cursed tattoo, the altar lamp lit up strangely. They found that they had become the only two marked "keys" in a hunting game that spanned Yin and Yang——
Behind a door lies the truth about Jiang Lin's mother's death.
Behind the other door is the golden sea of blood that Bai Yuan has dreamed about since he was a child.
In the real world, the "Sleeping Beauty Syndrome" section of the forum is frantically refreshing their death countdown...
——**"Find each other, or become each other's door."**
The intention: to tear apart the shackles of human nature within the established rules, and to use rationality and madness to create the key to life.