Female bandit chief Yan Jiuniang, relying on a decree of amnesty, saved a strange man from the execution ground and kept him in the stronghold to settle down. Three years later, she went to the northern border to guard the frontier, and was ennobled as the Great General Defending the North by virtue of her military exploits. When returning to the capital to receive rewards, she discovered that the man from back then turned out to be the current emperor, and their son and daughter were also in the palace. Powerful officials usurped power, and old cases were uncovered. Yan Jiuniang does not yearn for the glory of the empress's position, only seeking to clarify old cases, protect her children, guard the northern border and the country, and live according to her own wishes.