Huang Xiao Gui, a key witness in a major criminal case in a city in Southeast Asia has escaped. SWAT police Zhang Hao went undercover in a prestigious International School, in hopes to find Huang Xiao Gui by approaching his daughter Huang Ying. At the same time, the criminal group sent a killer to wait for an opportunity to kidnap Huang Ying. The mole in the police station, the hired killer, and Huang Ying’s refusal to cooperate have put Zhang Hao in a difficult situation. The dangerous war is about to begin. How will Zhang Hao respond?