In the last years of Chongzhen, a top-secret "fire sign" military order related to the national destiny was rushed to Shanhaiguan. The code book was robbed midway and no one could decipher it. Xu Mo, a veteran of the Ministry of War, took the risk to decipher it with the help of his remaining memories. The translation appears, but it is a shocking killing sequence of "killing the person who took the order, because he has rebelled". The truth is not yet known, and the murderous intention has arrived. Is it an ironclad order from the imperial court or a shocking conspiracy? The fainting old official and the accused commander all became the center of the whirlpool. When the country was in ruins, a secret order ignited the final smoke.
