In an inconspicuous hardware small shop in an old urban area, young store manager Lu You unexpectedly activates a mysterious system, and from then on all things in the world can be sold. From netizen anti-counterfeiting challenge matches to bigwigs from all walks of life visiting to beg for goods, discontinued old parts, rare collections, and cutting-edge technology are readily available. No one knows where the limit of this small shop is, and a commercial legend started by a tiny hardware store is quietly moving the pattern of the industry and the city.