When Lin Mo wakes in a hospital room covered in bloody writing, he discovers that he has been caught up in a bizarre game of survival. The rules branded onto his wrist are his only guide to staying alive: “You must remain in your hospital room after 10 p.m.” “Lower your head and greet any doctor you meet.” “Under no circumstances may you enter the special ward on the third floor.” Every rule hides a deadly threat, and anyone who breaks one faces unimaginable punishment.
Luckily, Lin Mo unexpectedly awakens the ability “Rule Eraser,” which lets him see hidden loopholes in the rules. The secret of the doctor’s badge, the trap in the nurses’ station’s medicine, the chain that comes loose at three in the morning… He proceeds cautiously through the terrifying scenarios, forming alliances with other players even as suspicion simmers beneath the surface.
As the gear-shaped mark gradually takes form, the secret of the “source energy” in the experiment logs comes to light. Lin Mo discovers that the game is connected to the truth behind human experiments conducted thirty years ago. When the figure who created the rules appears in Room 307, he must choose between obeying the rules and breaking them, and uncover the ultimate conspiracy behind the game of survival.
