Editing Infernal Affairs II (section)

=== In 1997 ===

Lau is promoted to Probation Inspector; Chan is a full-fledged triad member. Hon has a new wife and child in Thailand. Wong admits guilt of conspiracy to murder to an internal investigation, but the department clears him so that he can take down the increasingly powerful Hau. Wong persuades Hon to return to Hong Kong to testify against Hau, as revenge for Mary. Hau is arrested, ruining his attempt to enter politics. Hon's testimony would threaten a short jail sentence for Hau. Chan later passes Wong decisive evidence against Hau.

Triad member Uncle John has the Thai mafia take Hon's Thai wife and child hostage. Hon escapes [[witness protection]] and confronts Hau. Hon reveals that the Thai mafia were allied with him; they kill John. Hon also proves that Paul is holding the rest of the Ngai family hostage in Hawaii. The police arrive as an infuriated Hau prepares to shoot Hon. Hon accepts his death as revenge for Hau to be killed or jailed for life. Wong shoots Hau to save Hon. As Hau dies in Chan's arms, he discovers Chan's wire.

Wong laments the failure to imprison Hau. Paul insists on executing the Ngai family to tie up loose ends, despite Hon's reluctance. The murders turn Hon into a top criminal target for Wong. Undercover cop Chan joins Keung in Hon's triad, while Lau, Hon's police spy, handles a case for a young woman, Mary, his future fiancée, setting up the events of ''[[Infernal Affairs]]''.