The timeline advances to when Shen Fan is seven years old. On the surface, he is a second-year student at Binhai City Experimental Primary School; secretly, he is still a "special consultant" assisting the city's criminal police team. After the Zhou Hu criminal group was destroyed, Binhai City ushered in a brief period of calm, but Shen Fan's "crime radar" frequently sent out weak alarms late at night - a new type of crime that was more covert and more technological was growing.