ACT IV

Scene 1 - Macbeth sees three apparitions. The first tells him to beware of Macduff. The second says only a man that was not born from a woman will harm Macbeth. The last tells him that until Birnam would moves to Dunsinane, he will not be vanquished. Macbeth feels safe since a wood can never move and he knows no people not of woman born. He thinks the prophecy is a good and insures him a safe life.
Scene 2 -   The murderers arrive; kill the son, but Lady Macduff escapes.
Scene 3 -  

Ross tells Macduff that his family is dead. He encourages revenge.

Scene 3 - Macduff plans to go Scotland