Import Blu-ray/Region All pressing. Includes all three films in the trilogy. Directed by Wai Keung Lai and Siu Fai Mak, IA 2 is the prequel and IA 3 is the sequel to the highly successful original Infernal Affairs, the movie on which Martin Scorcese based his recent hit, the Departed, on. in Infernal Affairs 2, Yan is assigned to be an undercover cop in the the triads while Mings joins the police force. Infernal Affairs 3 explores through an intricate interlacing of stories what happened before and after Tony Leung's character's death.