Three middle school students suddenly traveled to a world that completely appeared in history in class. One fell into the intrigues of the palace and met two men who looked exactly like the people their good friends Xi'er and Jing'er loved in modern times, as well as a princess. The two fell into Yangzhou far away from the palace and met a man who looked exactly like the person Le'er loved. It was really funny. Later, a series of funny things happened, which brought the three people together again. Later, they discovered that the three men were the people they loved, but they had different identities, lost their memory, and no longer recognized themselves. Everything was messed up. However, in the end there are still lovers who get married, and God still loves them very much.