His mother is hospitalized, leaving behind a debt of 200,000 yuan, and Gu Chang'an loses his job after refusing to take the blame for his boss. With nowhere else to turn, he unexpectedly travels back to the foggy city of 1888. With the ability to travel between two different eras, he gradually transforms from an ordinary worker earning 5,000 yuan a month into an antique dealer, and meets Evelyn, who runs an antique shop. However, when he witnesses Chinese artifacts from the Great Xia scattered across foreign lands, making money is no longer his only goal. What others consider priceless treasures are things he is determined to bring home. As museum security grows increasingly strict, exhibits begin disappearing one after another. This time, he intends to bring every lost national treasure back home!