Duan Chun is a "perfect specimen" in the second grade of Qingjiang Middle School - his grades are firmly in the top three, he is gentle and polite to others, and he always has the right smile. No one knows that under this skin of self-restraint and courtesy, there is a beast called "possession" hidden. He desires to control everything, but uses the most precise calculations to lock all desires into rules.
Until that day, he accidentally saw the school bully Zhao Tianci beating his classmates in the equipment room. In order to protect himself, Zhao Tianci was forced to share a secret with him - a recording of the academic director accepting bribes. Duan Chun did not call the police, but kept the secret in his heart with a smile, like a fine weapon.
He discovered that he had a special ability: any secret he knew would form an operable "rule loophole" in his mind. He began to use these loopholes to weave a chess game, forcing Zhao Tianci into a blind corner step by step. But Zhao Tianci is not a stupid bully. He smells the danger under Duan Chun's smile. When two smart people play chess in secret, the only rule on the chessboard is - the winner takes all, and the loser is doomed.
