In the third year of the siege of Divine Arm City, the city's food and grass were almost exhausted, but the "Tiantian Pond" did not dry up, and the soldiers and civilians could still hold on. The young man was ordered by his father to break out of the encirclement and ask for help. He crossed the Mongolian army's blockade and met a girl transporting grain on the ancient road in Bishan. Her village was organizing civilians to try to transport a batch of grain and grass to the front line through the ancient road. The two of them walked together, and every bluestone on the ancient road could be a battlefield. The girl told him that her family had been transporting salt on this ancient road for three generations, but this was the first time to transport grain - because "when the city is there, the family remains; when the city is destroyed, the family is destroyed."
Ending: The reinforcements did not arrive, but the boy chose to return to God's Arm City to stay with his father. The girl brought the grain and grass to the city wall and threw them into the rope ladder through the city wall. On the day the city fell, the young man jumped off a cliff and died for his country. The young girl built a tomb for him beside the ancient road.
