Get free homework help on William Shakespeare's Macbeth: play summary, scene summary and analysis and original text, quotes, essays, character analysis, and filmography courtesy of CliffsNotes. In Macbeth, William Shakespeare's tragedy about power, ambition, deceit, and murder, the Three Witches foretell Macbeth's rise to King of Scotland but also prophesy that future kings will descend from Banquo, a fellow army captain. Prodded by his ambitious wife, Lady Macbeth, he murders King Duncan…