This Act opens with the three Weird Sisters setting up the entire theme of the play: Fair is foul and foul is fair. A war is taking place against Scotland (the setting of this play) and Norway. Scotland is victorious due to the valiant efforts of Macbeth. The traitorous Thane of Cawdor is captured and executed. King Duncan decides to reward Macbeth with the title of Thane of Cawdor to show his gratitude.
The scene shifts to the battleground where the three Weird Sisters confront Macbeth and Banquo, telling Macbeth that he will become Thane of Cawdor and eventually king. Macbeth soon learns of his new title, fulfilling the first part of the prophesy, and sends word to his wife. King Duncan plans on staying the night at Macbeth's home.
Lady Macbeth receives the news and immediately plots the death of King Duncan so her husband will be king. Lady Macbeth manipulates Macbeth into following her plans, and he reluctantly agrees to murder Duncan. By the end of Act I, Macbeth is determined to follow through with the plan. Act II:
Macbeth again has some doubts (and visions), but he soon talks himself into following through with the murder. Macbeth freaks out so Lady Macbeth finishes the rest of the plan by wiping blood on the drunk guards.
The next morning, Macduff and Lennox arrive at Macbeth's, and Macduff discovers the dead body of King Duncan. All are shocked and Macbeth plays his role to perfection. The guards are immediately suspect and Macbeth kills them "in a fit of sorrow and rage." Malcolm and Donalbain, the King's sons, flee the castle because they are afraid that they will be blamed for the murder of their father. The king is soon buried.
Banquo begins to suspect Macbeth for the murder of King Duncan and Macbeth in turn feels that Banquo will reveal that it was he that killed the King. Therefore, Macbeth sends out some thugs to murder Banquo and his son, Fleance. Banquo is murdered, but Fleance escapes.
Macbeth, Lady Macbeth,...