XVII century. Europe has already been covered by the shadow of the Thirty Years' War, caused by the centuries-old confrontation between the Catholic and Reformed churches. But the leading European states - France, England and Spain, thirsting for world domination, have not yet entered into an open battle and are only intriguing against each other, groping for the enemy’s weak points... The sister of King Louis XIII of France, Princess Henrietta Maria, turns from a little girl into a dazzling a beauty endowed with a subtle mind and ambition. Realizing that royal origin does not guarantee her either a successful marriage or love, the young princess arranges her own destiny by marrying the king of England. But being a queen and ruling a state are, alas, not the same thing, and the brilliant Duke of Buckingham, her first minister, does not intend to share power...