Duan Hong is a blaster of the special forces. Three years ago, his team was ambushed on the border of Yunnan and Myanmar. The entire team was wiped out, and only he survived. He returned to Shanghai with scars all over his body and became an underground liaison for the military commander. He carried bags at the dock during the day and laid mines in the ruins at night. He only had one idea: to find out the traitor who betrayed the team and make him pay with blood. But when he followed the clues and found No. 76, He found that the mole had been dead long ago, and the truth about the ambush that year was much deeper than he thought. Some people don't want him to continue investigating, some want to use his hands to kill people, and some are hiding in the dark, waiting to see him fight with the Japanese and lose both sides. Duan Hong put out the cigarette butt in his hand and smiled. Since they all regard him as a chess piece, he wants to see who is the holder of this chess game.