Act 1, Scene 5 - Lady Macbeth Plots Against Duncan
Act 2, Scene 2 - Macbeth Has Killed Duncan
Macbeth and Banquo meet the Witches. The Witches predict that Macbeth will be Thane of Cawdor, then king. They predict that Banquo's descendants will be come kings too. Macbeth and Banquo then meet Rosse and Angus, who tell Macbeth that he has been given the title 'Thane of Cawdor'.
Act 2, Scene 4 - Macbeth is to be King
Lady Macbeth reads a letter from her husband telling her about the Witches' prophecies. She begins to plot King Duncan's murder. Macbeth arrives and they decide to kill Duncan that evening.
Act 3, Scene 3/4 - Banquo is Murdered and his Ghost Appears
Macbeth has killed Duncan and he's overcome his guilt. In his confusion he returns still holding the daggers. Lady Macbeth takes them back to Duncan's room and smears blood on the servants to make them seem guilty. Both Macbeth and Lady Macbeth end up with blood on their hands.
Act 4, Scene 1 - Macbeth Visits the Witches
Duncan's eldest son, Malcolm, was his heir to the throne. However Malcolm and his other son, Donalbain, decide to run away because they believe that they will be murdered next. Macbeth is crowned King.
The murderers attack and kill Banquo, but Fleance escapes. Macbeth is holding a feast his castle with the thanes and tells Macbeth that Banquo has been killed. Macbeth is terrified by visions of Banquo's ghost.
Macbeth visits the Witches and they summon three apparitions. Each apparition makes a different prophecy about Macbeth's future. One of the apparitions tells Macbeth to be careful of Macduff, so Macbeth decides to have Macduff killed.