The document provides a summary of Act 1 of Shakespeare's Macbeth. It introduces the main characters - the three witches who prophesize that Macbeth will become king, Macbeth who hears this prophecy, and Lady Macbeth who convinces Macbeth to murder King Duncan so that he can take the throne. The summary describes how Macbeth kills Duncan while he is staying at Macbeth's castle, and then takes the throne as the new King of Scotland.