The Boondock Saints (1999)
The Boondock Saints follows twin brothers Connor and Murphy MacManus, who embark on a mission to rid Boston of its criminal underworld. After killing two mobsters in self-defense, they believe they are on a divine mission from God to eliminate evil. With the help of their friend Rocco, the brothers confront organized crime, facing police and a relentless FBI agent, Paul Smecker. The film, filled with action, dark humor, and intense themes of justice and morality, has gained a cult following over the years for its unique narrative and compelling characters.

