Lin Mo was once a trace examiner in the criminal investigation system, and he was best at restoring the truth from details. Until a strange and unsolved case completely destroyed his common sense, he left his job and lived alone. He thought he was just entangled in old cases, but unexpectedly he was dragged into copies of the rules that came to reality.
Midnight hospital, unmanned high school, the last subway, a strange community, an abandoned amusement park... Each copy has a set of rules that must be followed. Those who violate them will be erased, and those who obey may not survive. Fortunately, Lin Mo can see the loopholes and conflicts under the surface of the rules, but this ability cannot directly give him answers. He can only rely on criminal investigation-style observation, trial and reasoning to find a way out in desperate situations.
While others are still living by the rules, he has already begun to dismantle the rules, use the rules, and counter-kill the rules. But as the number of clearances increased, Lin Mo gradually discovered that the dungeon was not just a death game, but the real world had also been penetrated. Some people are secretly reclaiming the origin of the rules, and some organizations are screening survivors. However, the old case that changed his fate many years ago is inextricably linked to all of this.
It's a very nice book with a clear structure.