Chu Yan was expelled from the army and became a prisoner of war of the enemy. However, in a desperate situation, he integrated the remaining soldiers and secretly linked up with the rebel general Mu Xiao and the orphan girl Su Tang. They used the prisoner of war camp as a chessboard to set off a bloody coup that subverted the coup. When the former instructor Han Xiao led an elite encirclement and suppression campaign, and when military doctor Li Jiu's encrypted manual was finally put together, Chu Yan understood that real war is never about killing the enemy, but about letting the entire system devour itself in the collapse of trust.