Washed-up revolutionary Bob exists in a state of stoned paranoia, surviving off-grid with his spirited, self-reliant daughter, Willa. When his evil nemesis resurfaces after 16 years and she goes missing, the former radical scrambles to find her, father and daughter both battling the consequences of his past.
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.