The Hilshire-Triela fratello head to Naples in search of Mario Bossi, an infamous criminal long since retired. Their mission is to find and protect Mario, even against his wishes. Reason: many people want him dead -- He's a government witness in a case against organized crime. But the friction between Hilshire and Triela might be too much of a struggle for the fratello as they try to concentrate on their mission.
click here to see where to watch or (watch here).
Ready to Watch Gunslinger Girl, Season 1, Episode 4?