In the end of the Seventeenth Century, Don Juan de Marana is repatriated from London to Madrid after a serious diplomatic scandal caused by his affair with a British fiancée on the Eve of her marriage with a Spanish noble. The Spanish ambassador in London Count de Polan sends a recommendation letter to his friend Queen Margaret to give an opportunity in the court to rehabilitate Don Juan from the gossips and rumors about his love affairs, and he is hired as instructor of the art of fencing in the Spanish Academy. He secretly falls in love for Queen Margareth but becomes loyal to her and her irresponsible and weak husband, King Phillip III. Don Juan discovers the plan of the Machiavellian Duke de Lorca (that intends to declare war to England and rules Spain. With the support of his friends, Don Juan defends the Queen, the King and Count de Polan against Duke de Lorca and his men.