Shen Yuan, a noble young lady of the capital, is known to the world as gentle and virtuous, a perfect puppet who sacrifices herself for her family. No one knows that every night she becomes a black-veiled wandering physician, feeling the pulses of powerful people with private ailments and taking the measure of her own fate. Then the most mysterious guest arrives at her clinic: the cold-faced Imperial Uncle who is betrothed to her beloved younger sister. Holding a portrait, he looks at her with a meaningful gaze. “You look very much like someone.”