Macbeth is a Shakespearian tragedy about Macbeth, a nobleman and renowned warrior. After witches inform him that he will be king, he travels with his companion Banquo to King Duncan's castle. Macbeth's wife, Lady Macbeth, convinces him to kill Duncan and he obeys. After killing Banquo and others, Banquo's ghost returns to the castle, haunting Macbeth. Macbeth receives a tragic prophesy from the witches, Lady Macbeth kills herself out of guilt and King Duncan's son, Prince Malcom, invades the kingdom and kills Macbeth.
Lady Macbeth is full of unrest and calls for Macbeth to attend to her. He announces his own misgivings and upon doing so, declares that he has arranged for yet another horrible deed to be undertaken to ensure the throne, that there are too many more threats to the throne that must be dealt with. He asks his wife to be happier and kind to Banquo at dinner so as the he will be unsuspecting and that he will successfully be dealt with and eliminated as a threat to the throne.