When female coroner Su Ninger investigates a bridal sedan chair murder case, she meets the seemingly frivolous Heir Pei. From clashing with each other to entering a fake marriage to flush out the culprit, they join forces to investigate the old serial bride disappearance case. Uncovering layers of long-sealed secrets and going through life-and-death tests, their romantic feelings gradually grow. Eventually, the grievances are redressed, and the two transform their fake marriage into a sincere and wonderful union.