On the day the city was besieged by the enemy, Li Xiao detonated the gunpowder magazine and blew up the enemy commander's camp. The battle shook the world. But this desperate move pushed him into the abyss of court suspicion. The forbearing military doctor Shen Zhao has mastered the secret map of the former dynasty's firearms, deputy general Zhao Qianshan hides the truth about the family's annihilation, the enemy camp's strategist Liu Rumei secretly lays a net, and the supervisor Zhou Yanzhi presses forward step by step - when wolves attack the enemy camp at night, poison seeps into the grain channels, and soldier symbols secretly change hands, a troubled chess game ignited by gunpowder has just begun.
