Macbeth and Banquo come across 3 witches after there victorious battle. The 3 witches prophesied that Macbeth would be Thane of Cawdor and King of Scotland. They also prophesied that Banquo's heirs will be King of Scotland.
Lady Macbeth has a plan for Macbeth to be King. The plan consists of killing King Duncan however Macbeth is worried. Lady Macbeth is determined.
Macbeth is completely terrified and regretful after killing King Duncan. However Lady Macbeth reassures him it will be okay and that he needs to forget about it.
Now that Macbeth is Thane of Cawdor, Banquo get's suspicious that Macbeth possibly could have killed King Duncan.
Macbeth then suspects Banquo knows of his deeds and orders some of his men to murder Banquo and his son Fleance but Fleance manages to escape. The ghost of Banquo haunts Macbeth.
Malcolm and Macduff's army get ready to attack Macbeth's castle as they know of his deed. Macduff is victorious and kills Macbeth. Macduff got his revenge on Macbeth for killing his wife and child and is now King of Scotland.