Shen Qinghuan, a princess of a fallen kingdom, hides her identity and works as a tea shop assistant in the capital, keeping her head down and her talents concealed day after day. Until one day, she saves a brocade-clad man being hunted, only to discover that he is Lu Chen, the commander of the Imperial Guards, secretly investigating in disguise. He is investigating the old case of her kingdom's destruction; she wants blood for blood. The two join forces to uncover a shocking conspiracy, and the mastermind behind it turns out to be the person closest to her.
