Xiang Mujin, 16 years old, a single parent, a genius girl, has a 12-year-old sister Xiang Luoying. At the age of 13, he went to Harvard University to study physics. By chance, he became an FBI agent. He returned to China to perform a certain mission and went to EVIT High School, where he joined the school's reasoning club. During a mission, he met Luo Qingyu and his partner Ge Ruolan, and finally ended up with Luo Qingyu...