Lin Feng is a talented but frustrated toy designer in modern times. Due to an accidental electric shock, he traveled back to the Yongle period of the Ming Dynasty and became the only son of a poor craftsman family in Yingtian Mansion. With modern toy design concepts and mechanical knowledge, he initially made a name for himself in the capital by making novel toys (such as clockwork mechanical birds, Rubik's cubes, and building blocks). He gradually attracted the attention of the powerful, and was then involved in palace struggles, court intrigues, and transnational wars.
During the course of the adventure, he relied on modern knowledge to resolve many crises and produced various "toy" military equipment (such as a repeating crossbow disguised as a toy box, a simple artillery that looked like a children's car). He was secretly entrusted with important tasks by the emperor. At the same time, he had emotional entanglements with many women of different identities. He eventually became an important figure influencing the fate of the Ming Dynasty, established a huge business and technology empire, and gained a colorful harem life.
