The azure moonlight in the emergency room split open time and space. When the intern Lin Xiaowan awoke, she found herself in wedding clothes, lying in a Tang-dynasty coffin. The “bride” who was supposed to marry into another family in her younger brother's place was now prying open the jaws of a poisoned girl with a silver hairpin. A flicker of anatomical diagrams shone from the bronze jade pendant at her throat, quietly opening the curtain on a mystery in Chang'an that had lain dormant for a thousand years.
As a scalpel crossed swords with silver needles in a foreign merchant's mansion, and the steam rising from a medicinal pot met Pasteurization, Lin Xiaowan charged headlong through the High Tang with memories of modern medicine. As she treated the sick and saved lives, she pieced together a startling truth: Chang'an in the Zhenguan era was in fact a “human experimentation laboratory” run by a mysterious force, and the pendant at her throat was the key to opening a rift in time and space. When the pendant projected a three-dimensional anatomical map of Chang'an at the West Market night fair, and a shadow removed his mask to reveal features resembling Pei Ji's and spoke of “temporal cancer,” a medical conspiracy and a struggle over time spanning past and present burst into motion, with Lin Xiaowan at its center.