The opera tells the story of Magnus Erlendsson, Earl of Orkney, who became a Christian saint and martyr. The nine scenes are entitled: 1. The Battle of Menai Strait; 2. The Temptations of Magnus; 3. The Curse of Blind Mary; 4. The Peace Parley; 5.Magnus's Journey to the Isle of Egilsay; 6.Earl Hakon plots to murder Magnus; 7. The Reporters; 8. The Sacrifice; 9. The Miracle.