Traveling through a parallel world, Lu Feng became a student at Southwest University of Science and Technology. He would go to work part-time at his uncle's farm machinery factory every holiday. One day while he was in class, a group of heavily armed police suddenly burst into the classroom and took Lu Feng away. In the interrogation room, the police and experts looked at the information in their hands with solemn faces. The students were all enjoying their holidays. What are you doing?