Two men operate on different sides of the law; one a mole with the Boston State Police department, the other within the Irish mafia. When bloodshed breaks out on the streets, each mole is dispatched to discover the other’s identity in a race against time… Starring Leonardo DiCaprio, Matt Damon, Jack Nicholson, Mark Wahlberg, Martin Sheen, Ray Winstone, Vera Farmiga and Alec Baldwin.