The growing ambition of Julius Caesar is a source of major concern to his close friend Brutus. Cassius persuades him to participate in his plot to assassinate Caesar but they have both sorely underestimated Mark Antony.
Macbeth, the Thane of Glamis, receives a prophecy from a trio of witches that one day he will become King of Scotland. Consumed by ambition and spurred to action by his wife, Macbeth murders his king and takes the throne for himself.