Shen Yu, an immortal who has lived from primitive society to the present, has witnessed the ups and downs of Chinese civilization for five thousand years, from the billowing dust and smoke of the battle of deer to the cold sea breeze of Humen. He hid in the cracks of the human world and opened an antique shop that no one cared about. His biggest hobby was to collect historical evidence that he had touched personally - the cinnabar bones from the ruins of Taosi Temple, the bronze sword from the Battle of Makino, the supervision token from the Humen Consumption of Tobacco... Every cultural relic is "evidence" that he lived.