15 years ago, Nangong Cheng and his teammates had an archeology, but since then there has been no news. At the time, Xiaonan Gongwu, who was only eight years old, held a funeral for Nangongcheng with the help of relatives and friends. By chance, he got a mysterious box.

Fifteen years later, Nangong Wu, who has become a student of the Department of Archaeology at Beiqing University, has become a man of the school. The female teacher Liu Yude is a literary teacher of Nangong Wu. She is dubbed by the students as Joan of Arc, because she is serious and old-fashioned, older and single. Her uncomfortable way of doing things often leads to the opinions of the students. As a mischievous student, Nan Gongwu is often called by Liu Yude to teach.