In the second year of Emperor Taizong of the Yu Dynasty, the beacon fires at the border never ceased. Having time-traveled to become a lowly border soldier at Heihe Beacon, Shen Lie found himself framed by the military right upon waking, forced to enter the Black Wind Valley of no return to perform mortal corvée duty. Relying on his extraordinary courage and martial prowess, he beheaded enemy chieftains and burned grain camps, reversing the desperate situation and breaking the deadlock. He rescued A Guduo, a Xianbei woman of mysterious identity, and the two probed and relied on each other amidst the lonely, freezing fortress. Amidst the blood, iron, and undercurrents of power at the border, they broke the deadlock with a broken blade and illuminated the rivers and mountains with solitary courage.