The play opens with three witches prophesying that Macbeth will become king of Scotland. Their prophecy comes true when Macbeth kills King Duncan and takes the throne. However, Macbeth grows increasingly paranoid as more of the witches' predictions come true, leading him to commit more murders to protect his power. Lady Macbeth goes mad with guilt and dies, while forces led by Macduff defeat Macbeth's army and kill Macbeth, fulfilling the remainder of the prophecies.
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