Shen Nannan, the legitimate daughter of the General's Mansion in the Dayin Dynasty, was blinded by lard in her past life. She wrongly trusted the green tea cousin Lin Wan'er and the hypocritical fiancé Pei Ran, leading to the tragic deaths of her father and brothers and the execution of the entire Shen family. As for herself, she was imprisoned in the Prince's Mansion by Xiao Yunzhao, the Prince Regent with ultimate power over the realm whom she had once bullied, and died full of resentment after suffering endless torment. Given a new lease on life, Shen Nannan returned to five years in the past. At this time, the Shen family had not yet fallen, and that future "madman Prince Regent" Xiao Yunzhao was beaten half to death because of her spoiled nature, lying in the stables. To save the Shen family, she decided to change her strategy; since she couldn't avoid him, she would raise him into her most loyal "dog".