Su Ningshuang, a descendant of Jianghu Yaolu, joined the Zhenbei Houfu on behalf of the vain Sister Di in order to repay the old favor of the Houfu. The Hou Mansion is surrounded by crises: the mean and snobbish Mrs. Xiao is always making things difficult, and the anonymous Lord Hou Xiao Jue hides his desire for revenge... Su Ningshuang relies on her superb medical skills and decisive temper to gain a foothold in the Hou Mansion, and Xiao Jue goes from testing each other to fighting side by side, and finally finds each other's sincerity in troubled times, and finally works together to uncover the truth about the old case, crush the three princes' treasonous plan, and protect the country and the people they love.
