Bounty hunter Marco Polo wanders the Kingdom of Kings and happens to take in Luban No. 7, a mechanical manipulator separated from Master Luban. To retrieve the "Tuling Treasure Box" tucked away in Luban No. 7, Marco accompanies Luban No. 7 on a quest to find Master Luban's family. However, they fall prey to an enemy conspiracy. From the Cloud Desert to the underground city of Chang'an, the two, having forged a deep friendship, face even more formidable challenges together. (Source: Tencent, Google translated)