Rules: I Saw the Death Mark

Lu Chen is a university professor. Teaching psychology, talking about the good and evil of human nature, the audience was full of students. But he himself does not believe in good or evil, only logic. Until one day, he found out that he was chosen. An apartment with no windows. A rule posted on the door. The seven people were suspicious of each other and wary of each other. The rules say: Follow the rules and live. Break the rules and die. But the rules don't say which one is true and which one is false. Lu Chen has no superpowers, no system, and no golden fingers. He only has one pair of eyes and a clearer brain than anyone else. He saw something that others couldn't see - behind the rules, there was another set of rules. And behind that set of rules, there is a truth that no one could have imagined.