When criminal psychologist Shen Moyan and emergency doctor Gu Xingye woke up in the Blood Moon Hospital in the "Abyss Corridor", reason and intuition were forced to form an alliance. He breaks the rules and protects lives. In the endless horror copy, they are each other's only coordinates. When cold logic makes an exception for one person, when selfless guardians learn to be selfish, the core of this game is actually the mutual redemption of two broken souls. They will eventually rewrite the rules of the abyss, or become each other's only light in the darkness.