This scene summary covers Act III of Macbeth. It outlines key plot points: Macbeth plots to kill Banquo and his descendants out of paranoia; Lady Macbeth expresses dissatisfaction with their situation; the murderers kill Banquo on Macbeth's orders but Fleance escapes. At the banquet, Macbeth is disturbed when he alone sees Banquo's ghost, showing his guilt and mental deterioration. He resolves to consult the witches again to maintain his grip on power, demonstrating his complete corruption.