When Siyuan and Xu Cheng returned to their old home in Shanghai, they received an international express delivery from a courier who called himself Li Ke. After opening the package, I discovered that it was an invitation for an archaeological project about the ancient city of Dongyi. A precious manuscript of a well-known international brand in a time capsule under the old house. Among them is half a volume of ancient maps leading to the ancient city of Dongyi, and the other half of the maps were entrusted to old friends in China. Therefore, Siyuan and Xu Cheng, together with the mysterious courier Li Ke, had to go out on behalf of their fathers to complete this nearly century-old agreement and to decipher this secret ancient scroll from 5,000 years ago.
