Synopsis：The Manxiang Tower, a famed gathering place for Chang'an's elite, is suddenly besieged by blood crows, and a bizarre murder occurs. The victim was lively moments before death, but afterward appears as if his essence was rapidly drained. The "Divine Pill," which had vanished for ten years, resurfaces... Notorious for her cold demeanor, female detective Shangguan Nanzhao inspects the scene and deduces a connection to the massacre of her fiancé's family a decade ago. The case grows ever more intricate as various factions become entangled over the "Divine Pill" formula. Who is the real killer? Who is the mastermind behind it all? Nanzhao edges closer to the truth, navigating one peril after another, only to find the outcome continually defies expectations.