S1, E1: In the border city of Chonghai in China, Bacheng Security Intelligence Department's former senior agent Li Junjie woke up from a nightmare of separation from his girlfriend Zhou Zixuan. He received a mysterious email from Moses. He learned that he was pursuing the killer Calais for three years. Bacheng. The world's most advanced network security device VX3 will be shipped to Bacheng City of M.