One day in 1984, Todd Bowden, a brilliant high school boy fascinated by the history of Nazism, stumbles across an old man whose appearance resembles that of Kurt Dussander, a wanted Nazi war criminal. A month later, Todd decides to knock on his door.
A briefcase with undisclosed contents – sought by Irish terrorists and the Russian mob – makes its way into criminals' hands. An Irish liaison assembles a squad of mercenaries, or 'ronin', and gives them the thorny task of recovering the case.