The saga’s finale digs deep into the psychology of its lead characters, as we witness undercover cop Yan’s past turmoil and triad mole Ming’s frantic flight from justice. Directors Lau and Mak employ non-linear storytelling for this ambitious, sometimes ambiguous thriller that perfectly mirrors the psyches of its duality-burdened protagonists. While expanding the story to an operatic scale, the filmmakers pile on the talent, inviting more award-winning actors on board for a gripping and thematically-fitting final act.