The Departed

In South Boston, the state police force is waging war on Irish-American organized crime. Young undercover cop Billy Costigan (<a href="/name/nm0000138?ref_=tt_stry_pl">Leonardo DiCaprio</a>) is assigned to infiltrate the mob syndicate run by gangland chief Frank Costello (<a href="/name/nm0000197?ref_=tt_stry_pl">Jack Nicholson</a>). While Billy quickly gains Costello&#39s confidence, Colin Sullivan (<a href="/name/nm0000354?ref_=tt_stry_pl">Matt Damon</a>), a hardened young criminal who has infiltrated the state police as an informer for the syndicate is rising to a position of power in the Special Investigation Unit. Each man becomes deeply consumed by their double lives, gathering information about the plans and counter-plans of the operations they have penetrated. But when it becomes clear to both the mob and the police that there is a mole in their midst, Billy and Colin are suddenly in danger of being caught and exposed to the enemy - and each must race to uncover the identity of the other man in time to save themselves. But is either willing to turn on their friends and comrades they&#39ve made during their long stints...