After a bloody battle on the border, Shen Xiao, the only remaining soldier, carries the company commander's unfinished last words and embarks on a desperate journey to find the battlefield code book. Jiang Jin, a female decoder behind enemy lines, grasps the truth, but chooses to remain silent; the traitor Bai Ya is camping every step of the way, just to lure her out; the rogue Iron Harrier guards the weapons in the coffin, and the mute woman spells out the rhythm of death with stones. When the beacon fire burned out, they discovered that those last words were not an order at all, but a code for surrender. And the truth is colder than war.
