Zhang Tao, a modern grain administrator, travels through the most turbulent era of ancient China: the Five Dynasties. He uses his golden finger - insect-proof grain storage technology to help local small grain merchants save a warehouse of moldy grains - seizes the opportunity of the war between Jin and Liang Dynasties and the soaring grain prices, buys low and sells high - gets to know low-level military leaders and petty officials, establishes an information network - helps Li Cunxu's army solve a moldy military grain crisis, and catches up with the high-ranking officials of the Later Tang Dynasty... Step by step to dominate the troubled times
