Macbeth and Banquo encounter 3 witches who foretell their prophecies finding out that Macbeth is to be thane and future king and Banquos line of children will be kings.
FLEANCE MY SON GO ESCAPE !
Lady Macbeth drugged the guards and manipulated Macbeth into killing king Duncan and framing the guards
Beware Macduff beware the Thane of Fife
Macbeth is made king
None of woman born shall harm Macbeth
be lion-mettled, proud, and take no care who chafes, who frets, until Great Birnam wood to high Dunsinane Hill Shall come against him
Macbeth kills an assassin to go after Banquo and his son Fleance to prevent the prophecies the witches foretold of Banquo not being a king but having a line of kings in his family.
After Macbeth is informed of Banquos death he hallucinates at the feast seeing a bloody ghost of Banquo
Macbeth revisits the witches after killing Banquo so he can eliminate anymore threats finding out that Macduff is to be killed but also that Macbeth is unstoppable no-one "woman born shall harm Macbeth"