It's the 10th century BC, the emperor (Tien Feng) is not well, and the medicines he is receiving from con artist "Immortal Li" are in reality only making him worse. There is a man in a nearby kingdom, "Divine Physician" Chang Po-chao, whom it's said could cure his epilepsy, but the only way to bribe the head of the border guard is with a new work by painter Wei Yu-pi. He, meanwhile, wishes to be paid in jade, in fact with a specific piece, which requires a thief. But Ting Yu-yu, the best in the area, claims to be retired, though his daughter Li-ting (Cheng Pei-pei) seems enthusiastic. And for the sake of secrecy, the archivists originally sent to recruit Chang don't even know it's on behalf of the emperor!