It followed the fictional quest of two children, Jules and Julie, in their travels across Eurasia seeking to overthrow the Empress Dowager of China, and consequently, release their fathers from imprisonment.
In Shanghai, China, 1895, Two children, Jules (a Chinese boy), and Julie (an English girl) are born on the same night, under the light of a full moon, fulfilling the first part of a prophecy foretold by the soothsayer Lao Tzu.
That prophecy describes two children, born to different parents, but in the same place (Shanghai) at the same hour (when the Moon is at its highest point in the night sky) whose mother perishes at birth, which begins the end of the tyrannical rule of Empress Dowager Cixi.
In addition, the prophecy also states that in order for this dethronement to occur, "the Twins of Destiny" must replace two stone tablets in the sacred Temple of Heavenly Harmony, in the Forbidden City.
The Dowager Empress is informed of this prophecy from her astrologer, and sends several eunuchs to kill the infants shortly after their birth.
Meanwhile, the Dowager Empress imprisons the biological fathers of Jules and Julie, a native of China and a blonde-haired, bearded British man, petrifying them into solid gold stone with the aid of her court magician Ho Cheng.
Twelve years later, 1907, The Twins, named Jules and Julie, who have been living in France with Captain Tournier whom they believe to be their father and call him "Papa".
The twins first goal is to reach Marseilles in France, where they will meet with Shou Cow and other members of the Society of Freedom who will help them with their journey to China.
They eventually meet the Great Sebatier, a traveling magician who helps the Twins evade the eunuchs with his incredibly strong dark magic, and assists them in their passage to Marseilles.
They then journey through Northern India, and then reach the mountains of Tibet, where Julie is severely injured by an enemy's knife wound.
Severely weakened, Ho Cheng tries to kill the twins (who are exhausted from their use of the Seventh Power), but is destroyed by Kung Lee the pirate, who makes a reappearance.
Upon entering a safe-house run by the Society of Freedom and being reunited with Shou Cow, the twins are given important information; that the voices of the statues they hear in their thoughts and dreams are actually those of their fathers.
They make plans with the Society to reach the Gates of the Forbidden City (which has been placed under heavy guard because of the arrival of the twins).
As the area is on high alert for the Twins and entrance through the main gate is impossible, they decide to move through the sewers connecting outside of the Forbidden City to the Inside.
Jules places the tablets on the altar, reads the Chinese inscriptions and through a magical force their fathers, who are imprisoned in stone nearby, are freed.
However, the twins manage to weakly call upon the Fourth of the Seven Powers one last time to attempt telekinesis, and are able to block the entrance to the temple with a large statue.
With their intelligence and a carefully planned strategy however, the twins, Martin and the society of Freedom manage to defeat Po Dung and the other eunuchs.
William Roberts (episodes 36-48) As a gift from the Moon Goddess, Jules and Julie both have the ability to summon a magic power that can do their bidding.
It is not until they meet Giovanne (approximately halfway through the series) that they learn that their magic manifests itself in "seven powers", which can be summoned at any time, so long as the twins can physically touch hands.