The summary provides a high-level overview of the key events and characters in Act 1 of Shakespeare's Macbeth in 3 sentences or less: The three witches predict that Macbeth will become Thane of Cawdor and King, which comes true when Duncan names Macbeth the new Thane of Cawdor for helping defeat rebels. Lady Macbeth learns of the prophecies and convinces the ambitious Macbeth they should murder King Duncan when he stays at their castle, seizing the throne for Macbeth. As Duncan arrives at Macbeth's castle, Macbeth and Lady Macbeth prepare to carry out the murderous plot to make the prophecy of Macbeth becoming