- An unknown group is behind a series of crimes in Hong Kong, China, putting the safety of the city and its citizens on the line. A secret anti-terror task force, A Team, is formed under Lok Ga Sing (Michael Miu), the commander of the flying tigers (Special Duties Unit), to uncover those behind the crimes. The team consists of Wang Gwok Dong (Bosco Wong), Cheung Man Long (Ron Ng), Ding Hou Yin (Kenneth Ma), Mou Yat Man (Jacky Cai), and Yiu Ga Nam (Jennifer Yu). A Team members finds there are foreign secret agents trying to gain intelligence in Hong Kong while evidence leads Lok to conclude that Au Yeung Ching (Dominic Lam) is running an underground syndicate. Meanwhile, Ho Chun (Joel Chan) returns to Hong Kong to avenge the past, revealing secrets behind a police raid in 1997.