The play 'Macbeth' by William Shakespeare is based on a Scottish plot. Macbeth was the military general of king Duncan and he displayed rare bravery in a victorious battle against Macdonald—a Scot who sided with the Norwegians. At the same time, news arrives concerning the arrest of the treacherous Thane of Cawdor. Duncan decides to give the title of Thane of Cawdor to Macbeth.
As macbeth and another general named Banquo returned home, on the way, in a barren heath, they met three witches and they predicted Macbeth to be the king of Scotland in future. This led to his thirst for power and began to plan how to occupy the throne of Scotland. His wife was more ambitious than he who not only planned to kill Duncan but olso instigated Macbeth to murder the king inviting him to a banquote.
In later part of the drama we see how thirst for power deviate a man from the right path and put a deaf ear to all good ways. But "As you sow, so you reap". Macbeth also met with the consequences of his evil deeds and finally died in the hand of Macduff.
The following websites will help you to study it well.