Retired female special police officer Zhong Xiaonan was ordered to protect Lin Zihao, the son of Chinese scientist Lin Heng, when he returned to China. The scientific research achievements of Lin and his son attracted the covetousness of overseas chaebols, who teamed up with criminal groups to try to kidnap Lin Zihao and steal his core data. Zhong Xiaonan teamed up with Chinese police officer Pete and fought many fierce battles with the criminal group. In the end, they thwarted the opponent's conspiracy and successfully escorted Lin Zihao back to China safely.