Bai Yishan, a man from science and engineering who was lucky enough to go to a good university, transferred from the chemistry department to the mathematics department at the instigation of his friend and chemistry master Shao Hongtuo. It seemed that his university life was about to be changed. In the new environment, a new person broke into his world. This person's name was Mo Baimu, and he was a new mathematics teacher. She looks very young, but her world view is like that of an old person, but she is very smart. The teacher discovered his extraordinary calculation ability and often kept him by his side as an assistant. The days in college seemed to be gradually getting more exciting, but soon, Bai Yishan discovered that something unusual was approaching him. As expected, not long after school started, Teacher Mo received a letter, and an investigation into the mystery began. He himself became a part of the mystery unknowingly, and began to solve the mystery... Later I learned that Mo Baimu was also a very human being, and maybe he had fallen in love with this kind of life of solving puzzles.