Snow fell over Chang'an. Snow landing on corpses tasted sweet. Shen Yan, Vice Minister of the Court of Judicial Review, could identify a killer with a single taste of the snow at a crime scene. This snow was poisoned. That night, a white-clad swordsman stopped him. "I killed the eleven unidentified corpses. Do you believe me?" His name was Yue Bai. His sword was so fast it vanished from sight, yet the question he asked was, "What does it mean to be a hero?" Black and white, two people who should never have met, were bound together by one bloody case after another. Forensics, overturned verdicts, political intrigue, the martial world... Together, they began lifting the lid on what had been buried beneath Chang'an for twenty years. There are no unsolvable cases in this world, only people no one dares to touch. And they dare to touch them all.