To provide such a short summary is a difficult task so I will give you some ideas and you can select from those. Start with key words to help you make your selection such as
- the battle between good and evil - this encompasses the themes of appearance versus reality including the natural and the unnatural, loyalty and honor versus treachery and order versus disorder
- Macbeth - a noble warrior is reduced to an irrational "idiot" - to use his own words: "It is a tale Told by an idiot...Signifying nothing"
- The influence of others and acceptance of responsibility for one's own actions which bring a set of consequences.
- An unfailing belief in Macbeth's contribution to his own fate or destiny.
From the above, you could conclude that
Macbeth is about one man's failings and his complete self-absorption and failure to accept the consequences of his immoral and unthinkable acts. Who started out as a noble warrior and indeed a hero in his king's eyes becomes the epitome of evil in the face of an environment where "fair is foul and foul is fair. "