In her previous life, He Su trusted the wrong man, bringing ruin to the Duke of Zhenguo's household. Her daughter was killed, and she herself fell on the battlefield. Only then did she learn that Qian Qian was an enemy-state spy all along. Reborn, she calmly set her plans in motion, killing Qian Qian from the start. Drawing on her memories of her previous life, she gathered talented people, groomed the princes, and brought the military under her control. She protected her country and brought peace to the realm, ultimately ushering in three generations of prosperity.