This period drama frames the tumultuous affair between Queen Elizabeth I and the man who would be King of England, Robert Devereux, the Earl of Essex. Ever the victor on the battlefield, Devereux returns to London after defeating Spanish forces at Cadiz. Middle-aged Elizabeth, so attracted to the younger Devereux but fearful of his influence and popularity, sends him on a new mission: a doomed campaign to Ireland. When he and his troops return in defeat, Devereux demands to share the throne with the heir-less queen, and Elizabeth, at first, intends to marry. Ultimately sensing the marriage would prove disastrous for England, Elizabeth sets in motion a merciless plan to protect her people and preserve her throne.

Christmas 1183--an aging and conniving King Henry II plans a reunion where he hopes to name his successor. He summons the following people for the holiday: his scheming but imprisoned wife, Queen Eleanor of Aquitaine; his mistress, Princess Alais, whom he wishes to marry; his three sons (Richard, Geoffrey, and John), all of whom desire the throne; and the young but crafty King Philip of France (who is also Alais' brother). With the fate of Henry's empire at stake, everybody engages in their own brand of deception and treachery to stake their claim.

Roman Polanski's version of Shakespeare's tragedy about a Scottish lord who murders the king and ascends the throne. His wife then begins hallucinating as a result of her guilt complex and the dead king's son conspires to attack MacBeth and expose him for the murderer he is.

Holmes is recruited to escort the heir to a European throne safely back to his homeland after his father's assassination.