Wang Jiao transmigrated to the Tang Dynasty, specifically during the reign of Emperor Taizong. While excited at first, he soon realizes that the era has already been heavily impacted by previous transmigrators. Finding familiar routes to success, such as writing poetry, creating glass, or developing cement, already taken, Wang Jiao decides on a different path, picking up his pen to write a new story: "The Gatekeeper Qin Dalang."