Infernal Affairs 2, ups the stakes spectacularly. Edison Chen plays the young Andy Lau and Shawn Yue plays a young Tony Leung, but the movie belong to their dueling father figures: Eric Tsang as the despotic triad mastermind, and Anthony Wong as the kind, patient cop who is Tony Leung’s handler. IA2 turns the first film upside down, revealing that the heroes of IA1 are amoral villains who’ll do anything for a promotion, and that the villains are decent men trying to make the best of intolerable situations. The intense Francis Ng joins the cast as a straight-laced son who, reluctantly, takes over the triad after his father is killed, and Carina Lau plays Eric Tsang’s ambitious wife.