Based on the Chinese-linguage Hong Kong gangster film of the same name ("Wu jian dao"), "Infernal Affairs" will be reset in Boston amid Irish-American mobsters and the cops who are their nemeses. The film was written by William Monahan. Damon would play a gangster who has infiltrated the Boston police department as part of its cadet class and has been steadily rising through the ranks. DiCaprio will play a cop who's been deep undercover inside the mob and is starting to come unglued. Each side works feverishly to flush the mole out, with deadly consequences.
