Macbeth meets the witches for help. They show him 4 prophecies. An armed head a bloody child, a child crowned with tree in his hand and a line of Banquo's lineage.
Lennox tells Macbeth Macduff has joined the English forces which is in England.
Murders rad Macduffs castle on Macbeth's orders and kill all in sight.
Macduff pleads to Malcom to help take down Macbeth and become the new king of Scotland.