Blaidd wrth y Drws

Dafydd and Helen have two children, Magw and Pryderi. One cold January evening the two children are asleep in their beds... But something comes through the open window, a beast. Magw is injured and Pryderi lies dead in his bed. Dafydd and Helen's lives are turned upside down and in the midst of their grief all sorts of accusations and insinuations are thrown at them.