Su Qinghuan transmigrates into the role of cannon fodder who is about to be executed with a white silk sash. She tears it off and stops the Regent's carriage in the street, trading intelligence for her life and marrying into the Prince's residence. She reorganizes the inner household, stands up to the Crown Prince, and battles a female supporting character who has been reborn, turning domestic power struggles into project management. Xie Jinglan, the fearsome Regent known as the Living King of Hell, initially intends to use her intelligence to exact revenge, but gradually falls for her contrasting blend of cool composure and burning passion. Together, they expose an old imperial case, moving from mutual scheming to risking their lives for each other. On the day the truth comes to light, he removes his crown and takes her to live in seclusion in Jiangnan. In this lifetime, the land and rivers are his betrothal gift, and the rest of his life is his repayment.