The Infernal Walker (The Redeemers)

synopsis

Ting Cheuk-fei (Michael Tse) is an undercover police officer who has been infiltrating the Fuk Wo triad gang for seven years. In order to keep his cover, Ting is more ruthless than other triad members and helps him gradually get closer to his goal. When a fellow undercover cop, Van, was captured by Big Banana (Ben Ng), a leader of Fuk Wo, Ting was forced to torture him and watch him get killed, Ting grows tired of his never-ending undercover job.