Can anyone give me a summary of Shakespeare's Macbeth?

Very detailed summaries of Shakepeare’s
Macbeth can be found at the links below, but here is a brief
overview of the plot of the play:

• As the play
  opens, fighting has been taking place between forces loyal to Duncan, the king of
  Scotland, and some Scottish rebels. Macbeth and Banquo, followers of Duncan, have been
  instrumental in defeating the rebels. Both men, however, are given attractive prophecies
  by three witches, who tell Macbeth that he will become king of Scotland, even as they
  tell Banquo that the latter’s sons will be kings.


• When
  Duncan visits Macbeth’s castle, Lady Macbeth, Macbeth’s wife, urges her husband to kill
  Duncan and become king himself in order to make the prophecy come true. Macbeth
  hesitates at first but then does indeed kill the king while the latter is sleeping,
  making it seem as if the king’s servants have done the deed.  The king’s sons, Malcolm
  and Donalbain, suspect foul play and flee the castle, leading them to become prime
  suspects in their father’s death. Macbeth thus becomes
  king.


• Although he is now king, Macbeth feels threatened
  by the witches’ prophecy that Banquo’s sons will be kings.  Macbeth thus orders the
  secret assassination of Banquo and Banquo’s son, Fleance. Banquo is indeed killed, but
  Fleance manages to escape. Shortly afterward, when Macbeth thinks he sees the ghost of
  Banquo at a banquet Macbeth is hosting, his mind begins to unravel. Seeking reassurance
  from the witches, Macbeth is told that he cannot be harmed by any man born of woman.
  They also tell him that his power is secure as long as Birnam forest does not come to
  the castle of Dunsinane. These words lead Macbeth to think that he is
  invincible.

• When Macbeth learns that
  an aristocrat named Macduff has become a follower of Malcolm (now in England, preparing
  to invade Scotland), Macbeth orders the brutal killing of Macduff’s family. As Malcolm
  and his army make their way toward Macbeth’s castle, Macbeth is an increasingly lonely
  and desperate figure. His wife has gone crazy, and he realizes that Malcolm’s army is
  approaching. He knows, however, that the witches have told him that his power is secure
  as long as Birnam forest does not come to the castle of Dunsinane. Thus, when he sees
  that Malcolm’s men have cut branches from the forest to hide themselves as they advance,
  Macbeth feels increasingly panicked. Ultimately, Macbeth is killed by Malcolm, whose
  birth was not a normal delivery.The play ends with Malcolm expressing gratitude to his
  followers and anticipating his own coronation as
  king:

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So thanks to all at once and to each
one,

Whom we invite to see us crowned at
Scone.