Seiclo oedd dull arferol Waldo Williams o deithio, a dyna wna Hefin Wyn yng nghwmni Teifryn Williams, nai Waldo yn y gyfrol hon. Mae'r ddau'n teithio ar gefn beic o gwmpas sir Benfro, i rannau o Loegr ac ar draws Iwerddon i gwrdd â rhai a adwaenai'r bardd.
Cycling was Waldo Williams' preferred mode of transport, and this is what Hefin Wyn does in the company of Teifryn Williams, Waldo's nephew, in this book. They travel on bicycles around Pembrokeshire, to parts of England and across Ireland to meet some of the people who influenced the poet.
