Lin Chen was originally an ordinary librarian with an extremely rational personality and sensitive to logic and details. Because he encountered an unsolvable dilemma in reality, he received an anonymous invitation marked "High Difficulty Puzzle Challenge" and was pulled into the game after clicking on it. Not a Virgin, she prioritizes ensuring her own survival, does not exclude cooperation but always remains vigilant, is good at exploiting information gaps and psychological games, and has a natural intuition for "loopholes in the rules". When facing sacrifices, "cost-effectiveness" will be calculated, and "necessary evil" will be accepted in extreme cases.