"Welcome to "Human Purge Plan", the pass rate of this game is 0.002%." When 7.5 Billion people around the world were suddenly forced to load into this survival game, the deliveryman Lin Mo discovered that the system version number he had obtained was -13. While others are struggling to survive in the apocalypse, his system is frantically prompting: "Administrator privileges detected, please destroy all players immediately." When the steel jungle turns into a man-eating maze, he must use a system that can predict death but cannot save, and find a third way between becoming an executioner and a martyr - until he discovers that each player's death countdown accurately corresponds to the real-world ID number cancellation time...