Macbeth (Orson Welles) is travelling across a misty moor one evening when he encounters three mysterious women whom acclaim him Thane of Cawdor. His is surely Thane of Glamis, and Cawdor is another man altogether - or is he? Then they proclaim that he shall be King of Scotland - and remain so unless some seemingly impossible circumstances combine to bring about his downfall. Empowered by their prophecy, he returns to the castle of King Duncan (Erskine Sanford) where he divulges his secret to his ruthlessly ambitious wife (Jeanette Nolan) thus setting in motion some regicidal scheming that will ...