Three witches meet on a heath and prophesy that Macbeth will become Thane of Cawdor and King of Scotland. A battle is won against invaders from Norway and Macbeth fights bravely. King Duncan hears news of Macbeth's success and promotion to Thane of Cawdor by the traitorous previous thane. Macbeth and Banquo meet the witches again who repeat the prophecies and say Banquo's descendants will be kings, confusing the two men.