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.