Athelstan, King of the English, Olaf Gothfrithsson, King of the Dublin Norse, Constantin, King of the Scots, Owain, King of Strathclyde, Hywel of the South Welsh, one 'great lamentable and horrible battle'. The year is 937 and Athelstan, King of the English and overlord of the British kingdoms, faces opposition to his rule that will culminate in the great battle of Brunanburh.