In the abandoned mountain temple, successive years of heavy snow trapped the anti-Jin army strategist and the rebel general. The two discussed the situation on the chessboard every day. On the last night, the general of the capitulation faction stated the reason why he had to rebel - all carrier pigeons would disappear when they were three feet away from the city, because the city was covered with higher-level spy networks. On one side of the chessboard, two people saw the chess game outside the battle.