Du Changming, a twenty-six-year-old e-commerce warehouse manager, had spent four years scraping by in Beijing before being laid off without receiving his wages. Driven out by his landlord's rent hike and left so destitute that he had to sell his luggage by the pound as scrap, he accidentally cut his hand on an old brass scale left behind by his grandfather. The scale had originally been worth no more than scrap brass, but after absorbing his blood, it became a remarkable object capable of identifying the value of old antiques. Whenever it encountered a valuable item that had been overlooked, its weight would quietly increase. Taking the scale with him, Du Changming resolved to return to his hometown, Xinghe County, and start over by opening a secondhand goods shop. Faced with junk sold by the pound at scrap yards and rules controlled by seasoned dealers, can he use the old scale to spot treasures in the murky world of secondhand goods, turn his fortunes around, and reclaim his dignity and his life?