When Q learned that there was a school "DDS" for training detectives in the city where he lived, he went to the entrance examination center of "DDS". On the way to the entrance examination of DDS, Q met Mei Nanhui, a girl with "instant memory", Kintarou Tooyama, an iron man with extraordinary abilities, and Xiao Wusheng, a talented programmer, and took the entrance examination together.
However, when Q and others conducted the final experiment of DDS, Q got to know Tian, a talented and indifferent beautiful boy. Later, after a series of experiments by Duan Shouyan, the president of DDS, Q and others were arranged by the group teacher to go to a special class in the police school and started a new life in the police school.