Stori rymus am geffyl a'i gyfaill yn cael eu gwahanu ar eu fferm yn Nyfnaint ac yn cael eu dal ym merw erchyll brwydro y Rhyfel Byd Cyntaf yw hon Mae'r awdur, Michael Morpurgo, yn feistr ar y grefft o adrodd stori afaelgar Addasiad Cymraeg o War Horse [In 1914, Joey, a young farm horse, is sold to the army and thrust into the midst of the war on the Western Front With his officer, he charges towards the enemy, witnessing the horror of the frontline But even in the desolation of the trenches, Joey's courage touches the soldiers around him]