To save my terminally ill younger sister, I risk using an ancestral jade cicada to livestream fortune-telling. But after I predict the details of a string of murders committed by the “Jade Buddha Butcher,” I become a target. When the police find seven bloodstained pieces of jade Buddha in the killer's bathroom, rules written in blood suddenly appear on my bathroom mirror:
“01: If the faucet is still running at 2:17 a.m., the person in the mirror will slit your throat.”
Even more terrifying, the user ID @FatedOne, who tipped a million, counts down the steps to my death in real time in the comments. He is the true rule-maker. The only person who can save me is Shen Si, the criminal investigation captain who escorted me home just today.
But the moment I tear open his shirt, the crescent-shaped birthmark at the base of his thumb, identical to the killer's and beaded with blood, begins to pulse eerily in time with the countdown...