In 1932, a man who died suddenly on the beach in Shanghai had blood-colored peonies on his neck. A forensic doctor who studied abroad discovered a silver needle from the Southern Dynasties, and ice silkworm poison was hidden in the embroiderer's tears. The Qing Gang boss's wedding banquet turned into a corpse, and Japanese merchant ships brought a breathing embroidered screen. When the Huangpu River began to flow back liquid silver, they discovered that the map of the concession was embroidered on a piece of human skin - millions of lives were used to make up for the thread that was broken thousands of years ago.