Huw always pops in to see his nan onthe way home from school - she bakeshim cakes and never fusses about hishomework. And so it' s a great shock when,one day, Nan forgets his name, and callshim Hywel - the long-unmentionable nameof her late brother. As Nan slowly slips intothe grip of dementia, Huw and his friendsgo on a quest to learn more about Hyweland what happened to him.