In the far east, there is a city forgotten by time, called the City of Time. The residents here live a peaceful and peaceful life, and the person who protects the city is a young man named Lin Xuan.
Lin Xuan is an ordinary librarian who has been interested in ancient books since he was a child. One day, while sorting out the library's books, he accidentally discovered an ancient book called "The Secret of Time." This book seems ordinary, but exudes a mysterious atmosphere...
