The Boondock Saints
"The Boondock Saints" is a 1999 action film directed by Troy Duffy. The story follows two Irish-American brothers, Connor and Murphy MacManus, who take it upon themselves to eliminate criminals in Boston. They believe they are on a divine mission to rid the city of evil, leading to a series of vigilante killings.
The film also features Agent Paul Smecker, an FBI agent who is trying to track down the brothers. Despite its initial limited release, "The Boondock Saints" gained a cult following and is known for its themes of justice, morality, and brotherhood.