Xu Donglin, who has been engaged in aquatic products foreign trade for 17 years, can tell customers about the old ports of Incheon and Busan, but he has never seriously walked past Penglai Pavilion at his doorstep. During a sea fog, he fell into Danya Mountain in the fifth year of Jiayou's reign in the Northern Song Dynasty - Penglai Pavilion had not yet been built. There were only the Tanah Lot Temple on the mountain that was about to move westward, and the Liang family who lived in the tea soup shop next to the temple.
The Liang family's shop needs to be cleared, and Xu Donglin does not have a household registration, so he can only help Liang Xiaoman move the pots and find a new shop while looking for someone to be his guarantee. Soon, a ship transporting timber for building a pavilion disappeared, and Liang Xiaoman's younger brother was also on the ship.
Xu Donglin knows how to read cargo orders and make corrections, but he doesn't understand ancient rules, let alone build buildings and ships. He can only work with the carpenters, boat owners and clerks to find out which ordinary people paid the price first for the unexplainable accounts, a ship that never came back, and a building that later became famous all over the world.
