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.
Back at Inverness, Macbeth’s castle and home, Lady Macbeth reads a letter from her husband describing the events that occurred during the day, immediately believing and recognizing the potential of the prophecies. She decides that certain things must be done to make the rest of the prophecy come true and goes on to describe the weakness of her husband. She decides immediately that King Duncan must be murdered and when Macbeth arrives back home she goes about describing to him what they must do to ensure he never leaves Inverness Castle.