The twin brothers who live overseas are the founders of a secret organization in the black and white industrial chain. After learning that his brother, who was the secretary of the county party committee, was assassinated and seriously injured and comatose, he resolutely returned to the country and took up the post of his brother.
While pretending to be dormant and dealing with the official chess game, he secretly investigated the case using the methods of an underground tycoon, uncovering the mastermind step by step, and staged a stealth puzzle of twin exchanges and a game of light and darkness.
