The soul of Zhang Tong, a doctor of traditional Chinese medicine from the future time and space, traveled back to the Tianbao period of the Tang Dynasty, and was possessed by Zhang Qiji, a knight of the Tang Dynasty who was "sexual, playful, ghostly and crazy". He thought he could use the black technology of the 23rd century to play with the Tang Dynasty, but unexpectedly, The cat-shaped robot that was protecting him malfunctioned while traveling through time and space, causing Zhang Tong to be embarrassed at critical moments. The plot that made him think he could "pretend to be a pig and eat a tiger" with his golden finger turned into "pretending to be struck by lightning", and even put himself in danger.
Fortunately, he always got help from his Chang'an partners, and finally saved the day and successfully completed the mission.
