Macbeth hears dreadful screams coming from the castle. He finds out his wife let out the screams and seemingly fell out of the window and died. He was not expecting this at all.
Macbeth oversees the troops charging his castle
Meanwhile Scottish and British troops are being rounded up by Prince Malcom, Old Siward and Macduff. They were plotting to take the throne of Macbeth and his now deceased wife.
Macbeth encounters young Siward and takes his life
Macbeth is unphased by the plan and becomes very arrogant and takes the three witches words for granted ('' Macbeth shall never vanquish'd until great burnam wood to high sinane hill shall come agains him '')
Macduff approaches Macbeth and discovers he has killed his whole family
Instead of running for his life, Macbeth chooses too fight for his throne in his final battle that leads to great defeat, the consequences he deserves for his horrible actions but he does not yet realize this and only few troops remain
The young Siward attempted to show his capabilities but did not succeed
Outside the castle, Macduff and Macbeth break into a huge duel. Macduff finishes the very deserving Macbeth by impailing his head with his sword, showing his victory to Malcom.