The witches are casting a spell on Macbeth. The quote they are chanting is " Double, double the toil and trouble, fire burn, and cauldron bubble"
Macbeth arrives and is told three aparitions. The first one is an armed head. The second one is a bloody child. The third one is a child crowned w a tree in his hand. Macbeth then asks about Banquo's children being the kings.
Lennox tells Macbeth that Macduff is disloyal an d plans on attacking him. Macbeth is furious and is out to murder his whole family.
Lady Macduff is upset that her husband left her. Everyone is killed in the Macduff castle due to Macbeth's orders.
Macduff is trying to convince Malcolm to overthrow Macbeth as King because he is lustful and unloyal.
Lennox arrived to tell Macduff that his family was killed.