A piece of blood-lettered rules has plunged the magical city into endless weird dungeons.
The red-clothed doll in an abandoned school building, the midnight knock on the door of an ancient house in the mountains, the nameless platform of the ghost train... The chosen one must struggle to survive in the cage of rules. "No going out after midnight" and "Don't look directly into the eyes of the doll", these clear-cut rules that seem to be life-saving are actually traps leading to death; the real life is hidden in the hidden rules between the words.
Lin Xuan, on the surface, is an ordinary college student, but in fact he is the last heavenly master of Xuanmen. The ancestral talismans and the secrets of physiognomy allow him to break through the fog of rules and break out of logical traps.
In the team, the veterans are responsible for the force, the smart leaders hide their selfish motives, and the cowardly students are actually the deadly moles. Every breakthrough is a game of rules and a test of human nature; every reversal points to the thousand-year secret behind the copy.
When more and more people were annihilated in strange circumstances, Lin Xuan discovered that these copies were not only survival games, but also hunting bureaus targeting Xuanmen.
And he is the last hope to break the situation.
