Lu Lian, a former special police officer who was fired, suddenly had an App called "Messiah Game" on his mobile phone. Rule number one: Find a door that won't open and push it open. There is a man sitting behind the door named Shen Yan, whose identity is "the rule maker". His mission is to force Lu Lian to implement the rules, each of which is absurd, fatal, and fatal if not completed. In the next month, five young women died in Jingcheng, and circles were carved into their palms. Shen Yan said: "The next target has appeared, you follow me." Lu Lian said: "Why should I trust you?" Shen Yan smiled: "Because I set the rules, and you are the only one who can break them."