While working on a roof, Fatty (Huw Ceredig) tumbles off a ladder and injures himself, initiating a feud between his family and the roof’s contractor, drug dealer Bryn Cartwright (William Thomas). Fatty’s twin junkie grandsons, Julian (Llyr Ifans) and Jeremy (Rhys Ifans) – who are not in fact twins – attempt to procure compensation from Cartwright, who refuses to pay up. The doped-up Julian and Jeremy then inflict anarchy not only on Cartwright and his family but on anyone they encounter.
