Low-born Helena is convinced that she and the high-born Bertram are meant to be. Bertram does not, so he runs off to fight in the Italian wars with his "#bff" Parolles, where he meets Diana. The lopsided love triangle all comes crashing down when the two women meet and devise a diabolical plan.

In 1561, Mary Stuart, widow of the King of France, returns to Scotland, reclaims her rightful throne and menaces the future of Queen Elizabeth I as ruler of England, because she has a legitimate claim to the English throne. Betrayals, rebellions, conspiracies and their own life choices imperil both Queens. They experience the bitter cost of power, until their tragic fate is finally fulfilled.

Marquise de Merteuil, former lover of Vicomte de Valmont, incites him to corrupt the innocent Cécile de Volanges before her wedding night, but Valmont has targeted the peerlessly virtuous and beautiful Madame de Tourvel.