Following the successful anti-terrorist operation, FA and BO BO return to their respective posts in the police. But FA misses her work in the CTU. When SAM invites FA and BO BO to join her squad on a permanent basis, the two lose no time to jump aboard and begin their training. A guilty-stricken FA tries to offer DAN help but blunders her assignment. DAN is convinced that she will bring him ill luck. SAM remains a close friend of her ex-boyfriend, JOE YEUNG, Chief Inspector of the Intelligence Unit, though JOE has a new girlfriend SUSAN FONG, a school teacher. Tycoon BEN LIN colludes with overseas gangs and terrorist groups in order to consolidate the leading position of his diversified business empire. But he is dealt a heavy blow when the Immigration Department seizes his drugs. BEN suspects that an undercover cop has informed on his drug trafficking and dispatches an assassin to get rid of the informer.… ...