The three witches are preparing a spell to cast on Macbeth. Which later Macbeth comes to them for help.
The witches show Macbeth and armed head that tells him to beware of Mac duff and a bloody boy who says Macbeth cannot be defeated by someone born of a woman. And a crowned child tells him he will not be defeated until the woods move.
lennox informs Macbeth that Macduff has joined Malcom in England. This makes Macbeth angry which makes him attack Mcduff's castle and kill everyone in it.
Lady Macduff is unhappy with her husband for abandoning them. Ross is revealed to be Lady Macduff's cousin. After a brief conversation between Lady Macduff and her son, Macbeth kills everyone in Macduff's castle.
Macduff is trying to convince Malcolm to attack Scotland and to take his title back from Macbeth. Malcolm denies Macduff's wishes saying that he is not fit to be a king because he is greedy and will spend all his time chasing women. He could be worse than Macbeth.
Macduff gets angry at Malcolm and Malcolm reveals that he was lying to test Macduff's loyalty. Ross arrives in England and informs Macduff of the tragedy that has happened at his castle.