After the Pei family was wrongfully accused, Princess Zhaoning, Jiang Mingtang, was forced to sign a confession, becoming an enemy in Pei Xingyuan's eyes. To protect the lives of the Pei family, she concealed the truth of being coerced, endured his misunderstandings and humiliation, yet constantly searched in secret for evidence to clear their name. The benefactor Pei Xingyuan had been searching for all these years was actually right in front of him. When the truth of the old case was finally uncovered, he finally understood what she had paid, and also discovered that some debts can never be compensated again.