Dyma ddilyniant i'r nofel boblogaidd Dal y Mellt . Mae gangsters Hustons and Co yn dynn ar sodlau'r criw - yn benderfynol o ddial arnynt am ddwyn eu deiamonds. Eir ar daith wyllt i Eifionydd, Bangor, Caerdydd a Llundain.
A sequel to the author's first popular novel Dal y Mellt . The Hustons and Co gangsters are hot on the heels of the crew and are determined to take revenge on them for stealing their diamonds. We are taken on a wild chase to Eifionydd, Bangor, Cardiff and London.