Modern youth Jiang Nan unexpectedly acquires a mysterious small cauldron capable of connecting ancient and modern times, establishing contact with Su Fengling, a female general of the Great Yan Dynasty who is besieged by the Tujue with cut-off water and food supplies. Jiang Nan trades the antiques sent by Su Fengling for huge sums of money, continuously shipping modern supplies to the ancient times. Relying on cross-era equipment, Su Fengling leads the military and civilians of Cangzhou to repeatedly defeat the Tujue army, ultimately beheading the enemy commander Anaru, bringing peace to the entire territory.