The story of the life of one of the most important figures of our time, Queen Elizabeth II, the monarch who reigned longest on the throne of England and the United Kingdom. Alberto Angela accompanies viewers on a journey through time that spans much of the 20th century and reaches the present day, recounting the slow transformation of the image of the monarchy by Elizabeth in the decades of her reign, through the main historical and family facts which have touched the royal house of Windsor until more recent times. With the most beautiful period images, many of which have been restored to their original splendor, viewers will relive the sumptuous royal ceremonies and discover lesser-known aspects of one of the world's oldest and most enduring monarchies. The episode's special guest is the English actress Helen Mirren, an Oscar winner for her portrayal of the queen in the acclaimed film "The Queen".