Once, long ago in the Kingdom of Hyrule, there existed a power that many thought was evil and would one day bring the destruction of their world. Only the Goddesses, the ruler of Hyrule, the Hero, and the Maiden of the Triforce could handle it. This power was kept by Twili people that lived in the Twilight realm. The Goddesses let the Twili keep the power since shadow was part of their world and not meant to be in the world of light. The only way anyone could enter the Twilight realm, was through the Shadow Mirror that was kept in the Gerudo Desert prison, only holding the most dangerous criminals in all the land.
But one day, the Sages that guarded the prison, made a peril mistake. A criminal that robbed not just gold, but power, led gangs of many villains and tried to kidnap the ruler of Hyrule was sentenced to death and the Sages chained him up against the Mirror ready to execute him. As one of the Sages got the sword ready, he plunged it at the criminal's chest killing him. But what seemed seconds after he died, his right hand began glowing with the Triforce triangle and he lived again! The Sages panicked as they realized that he was chosen by the Goddesses to have that power. The criminal took out the sword from his chest revealing the mark where the sword struck him and killed one of the Sages. Immediately, the Sages opened the Mirror and send him to the Twilight realm.
They were able to warn the Goddesses that he may soon bring chaos to the world of Light. The Goddesses called upon the Hero to save Hyrule from destruction. He was to stop the criminal from rising to power and bring peace to the world. The Goddesses called the Maiden of the Triforce, who guarded the power, to join and help the Hero on his journey. The Maiden's mark was the Triforce as well, but she represented all four pieces of it: Power, Wisdom, Courage, and Beauty. On their journey, the Hero and the Maiden became friends quickly, and began to fall in love with each other.
The Goddesses granted them the power to turn into divne beasts, as the Twili said. They could take the shape of wolves and attack unsuspecting enemies from anywhere that they see. In the Twilight realm, the two heroes were begged by the Twili to stop this evil man from taking their power. In the form of their wolf selves, the Hero and the Maiden attacked the criminal until he was weak enough, to attack with the Master Swords. But he began to leave the realm to go to Hyrule castle where his new power would bring destruction.
When they chased this evil man running away from the Twilight realm to Hyrule Castle, thinking that they may have to sacrifice themselves, to save the world, both the Hero and the Maiden confessed their love to one another and fought for the safety of Hyrule. The power in them both was let out when they confessed their love, and using the Master Swords, and the ruler of Hyrule using the Light Arrows, they finished off the villain and brought peace to the land of Hyrule once more.
The Goddesses knew that history may repeat itself one day, so they kept the power safe till the day it may be released again. The Hero and the Maiden were able to stay together and guarded the Kingdom of Hyrule on their many journeys. The Goddesses warned the Spirits to be careful over the decades of the Shadow Power and know who the Hero and The Maiden would be so they may be able to help them on their journey once again and save the world from the destruction.