Su Yao, who was the daughter of the Minister of Rites in her previous life, attached herself to the wrong prince and got involved in court disputes, which eventually led to the overthrow of her family and her death out of hatred. Once reborn, she vowed to cut off bad ties, stay away from political intrigues, and protect the Su family's safety. However, she unexpectedly saved Xiao Yichen, the prince of Changsha who should have died young, at the back door of Suzhou. Since then, she has gained a secret ally like a "cheap brother".
She pretends to be a pig and eats the tiger to avoid trouble, but she discovers that Xiao Yichen, who is as gentle as jade, is actually the "big bad wolf" who hides his secrets. Due to an assassination, the two gradually reveal the rebellion conspiracy of the third prince, and even reveal the truth about Xiao's mother's murder last year. From the hidden evidence of water transport in Suzhou, outsmarting Mr. Liu's spy, to the prisoner being robbed on the way to Beijing, and holding the ironclad evidence of General Li's collusion with the enemy, Su Yao and Xiao Yichen work together to break the situation. In the thrilling power struggle, they not only want to rewrite the fate of the family, but also protect the stability of Dayin. And this bond that began by accident has quietly grown into a deep love that spans life and death in the same boat through thick and thin.