A passenger on the plane suddenly became crazy and encountered strong airflow from the plane. When everything calmed down, the passenger had died of sudden cerebral edema. And the identity of this passenger is not ordinary. He is a senior researcher at a nanny unit and is under surveillance by relevant departments for allegedly selling national intelligence to foreign espionage organizations. His mysterious death brought the surveillance and pursuit to a standstill. At this time, the National Security Bureau arrested the deceased's brother Wang Hao. So he came up with a plan to let investigator Shen Kang (played by Sun Honglei) pretend to be Wang Hao and lure the snake out of the hole. In this undercover pursuit, the middle contact with Wang Hao is the flight attendant Li Xiaowan (played by Fu Jing) on the plane. The two of them fell in love with each other as they interacted with each other. But the identity of the undercover agent must not be exposed, and Xiao Wan is struggling with Wang Hao's underworld identity. As the investigation of the case deepens, the two are facing greater challenges...
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