William Shakespeare's Macbeth tells the tale of a valiant Scottish general named Macbeth who, under the influence of his wife and three witches, commits regicide in order to become the King of Scotland. The play explores themes such as ambition, power, greed, and guilt, which are still relevant today. Since its original publication in 1623, it has been adapted into films and performances throughout the centuries.

The play begins with three witches predicting Macbeth's rise to power through murder; they proclaim he will be Thane of Cawdor, then King: "All hail Macbeth! That shalt be king hereafter" (Act 1, Scene 3). After becoming Thane of Cawdor without any effort on his part, he believes their prophecy about him becoming king will also come true. Driven by ambition for power and encouraged by Lady Macbeth's ruthless manipulation, he decides to kill Duncan, the current ruler, so that he can ascend the throne.

Throughout the rest of the play, we see how this decision affects the characters mentally and emotionally as they struggle with feelings of regret and guilt leading up to Duncan's death. These misgivings led the couple to hire assassins to cover up evidence linking them directly to the crime. Even though some other characters may have initially viewed this crime as a positive outcome due to the advantages they gained—wealth or political status—eventually those same people realize their wrongdoing when faced with consequences further down the line; e.g., Banquo realizing how close his son Fleance came to danger during an assassination attempt against him.

The final act culminates in one last battle between Malcolm's loyalists and those who supported Macbeth. Malcolm defeats Macbeth using armies that came together not only for loyalty but also for a sense of justice. In conclusion, even though this play might seem quite dark, it does contain lessons about morality, values, and life choices, showing us that no matter our situation or desires, there must always be boundaries within which we should operate if we want to maintain good character regardless of the outcome.