During the Long'an period of the Dayin Dynasty, the former powerful general's mansion collapsed overnight, and his legitimate daughter Shen Qingtang fell from the clouds into the mire. Her father was falsely accused of collaborating with the enemy and treason, and her mother committed suicide by drinking poison. She managed to escape with half a broken jade pendant, but found out that she was not a biological child of the Shen family. The mystery of her life experience was intertwined with family injustices into an invisible web. In order to find out the truth, Shen Qingtang concealed his name and sneaked into the capital as "Qinghe", an apprentice of the spice shop. He relied on his photographic memory of smell and careful mind to maneuver in the treacherous circle of the powerful.
In the process, she accidentally got involved in the battle for the third prince Xiao Jinhan's inheritance. Xiao Jinhan appears to be an idle prince, but in fact he works step by step, secretly investigating old cases from many years ago. The two went from testing and using each other to seeing each other's sincerity in crisis after crisis. Shen Qingtang gradually discovered that his life experience was related to the "Phoenix Seal" lost in the palace. This seal was not only related to the change of imperial power, but also contained a shocking secret that could subvert the dynasty. When the conspiracy is revealed, she not only has to avenge her family, but also has to make a choice between love and her country. And the other half of the jade pendant is in the hands of the person she least expected...
