Macbeth and Banquo went to battle and fought against against Macdonald and the Lord of Cawdor in Scotland. King Duncan hears of both men's courage and gives Macbeth the title of Cawdor when they returned. When Macbeth and Banquo are on their way home, they encounter three witches that greet Macbeth as Thane of Glamis, Thane of Cawdor, and the witches basically told Macbeth that he will become king, "King hereafter". They prophesy that Banquo will not become king himself but one of his family members will. When Macbeth finds out that Duncan's son Malcolm is Prince of Cumberland, he was already chosen for the throne. Macbeth wanted to become king after hearing the witches prophesy. Macbeth then thinks of killing the king so he will be on the throne. Macbeth writes a letter to Lady Macbeth about his new plan of him becoming king and Lady Macbeth becoming queen after he kills Duncan. She fell in love with his new idea and planed the whole murder herself.
It was late at night when Lady Macbeth goes to Macbeth so he can kill the king. Macbeth sees a bloody dagger leading him into Duncan's room. Macbeth sees Duncan asleep and starts to stab and kill Duncan. Morning coms and everyone finds out that Duncan is dead. No one knows who it is but Macbeth starts to act a little suspicious. When Duncan's sons Malcolm and Donalbain find out his father is dead, they decide to leave Scotland.
Macbeth sees that Banquo is getting in his way and Macbeth remembers the witches prophesy that his son will become king and sees Banquo as a threat. Macbeth comes up with a new idea that he will send Banquo and his son on a horseback ride and have someone kill them. Later on that night, Macbeth sends Banquo and his son on a ride and has a murderer follow them so he could kill them both. Banquo was murdered but his son got away. Macbeth is at dinner and sees Banquo's ghost at the table that they are sitting at. At that point, Macbeth losses his mind and all his guests.
Macbeth then goes to see the witches who told him about the prophesy and asked them why he sees Banquo's ghost. Macduff leaves his wife and son at the castle and leaves to England. While he was away, Macbeth sends a murderer to go kill his wife and son. Macduff later found out about Macbeths doings and is furious. He then swears to himself that he will go kill Macbeth with his own sword.
Macbeth is preparing for the English invaders under the orders of Malcolm to attack his castle. While he is preparing waiting for the attack, he is concerned about Lady Macbeth and her sleep walking. She starts to vent about what her and her husbands had committed. Macbeth later on finds out that Lady Macbeth died by the possibility of committing suicide. Macbeth still goes out to fight and ends up killing Young Siward (son of Earl of Northumberland). Macbeth retches Malcolm and dies in Macduff's hands. Malcolm was then named the new King of Scotland.