It won several awards, including Oscars at the 79th Academy Awards; Best Picture, Best Director (Scorsese), Best Adapted Screenplay and Best Film Editing. Wahlberg was nominated for Best Supporting Actor but lost to Alan Arkin for his role in Little Miss Sunshine.
The film takes place in Boston, Massachusetts, where Irish Mob boss Francis "Frank" Costello plants Colin Sullivan as an informant within the Massachusetts State Police. Simultaneously, the police assign undercover cop William "Billy" Costigan to infiltrate Costello's crew. When both sides realize the situation, each man attempts to discover the other's true identity before his own cover is blown.