Long ago, when Hyrule was still young, three golden goddesses descended upon the land. They were Din; the Goddess of Power, Nayru; the Goddess of Wisdom, and Farore; the Goddess of Courage. Din, with her power created the earth we stand on. Nayru poured her wisdom onto the earth and gave to the land the spirit of law. Farore created all the life forms to uphold the law and maintain peace.
Their labors complete, they departed to the heavens. Promising not to interfere with what occurs in the human world, they created 3 triangles from their power called the Tri-force. They created a sword as well, called the Master Sword. They finally chose one female human to protect the land of Hyrule and made her a goddess. Her name was Hyllia.
The power was without equal. Her Grace, Hyllia, was attacked by the Demon King, Demise. Sacrificing her divine form, she chose 2 mortals to destroy Demise. The first, Zelda, was the goddess reborn as mortal. The second, Link, was her chosen hero. All Her Grace could do was seal Demise away until the time was right. Within the master sword, She created a spirit named Fi to aid her hero when the time came.
Her final act was hiding the Tri-force. She gathered the remaining humans and placed them on an out cropping of land and sent it skyward. Beyond the reach of the demonic hordes. Beyond even the clouds.
Centuries passed and the heroes chosen by the Goddess had begun their adventure. They went to the surface, but they had a rough landing. Groose, Link's childhood bully had grabbed onto Link as he descended. Encouraging Groose that everything was fine, Groose aided Link and Zelda in defeating The Imprisoned. An abomination like no other. Link fought with The Imprisoned, but once defeated, Ghirahim, the humanoid version of Demise's weapon, took Zelda and used her life force to break the seal on Demise. The seal being broken, Demise challenged Link.
A battle for the fate of the Tri-force and the world ensued. Swords clashed. The sound of connecting metal blows could be heard all around. When Link delivered the final blow, Demise, in all his anger, cursed all future descendants of Link and Zelda. He created a never ending cycle in which Demise chose a successor and gave all his rage and hatred to gain the pieces of the Tri-force and turn the world to darkness. Fi sealed Demise within the Master Sword, but at a cost. Fi was cursed with eternal slumber as to seal away his power.
Hundreds of years later, the cycle began. Reincarnations of Link and Zelda were given pieces of the Tri-force. Demise's successor was Ganondorf, the Gerudo King of Thieves, he was also given a Tri-force piece. It was the Tri-force of Power, which gave him immense power and immortality. Link was given the Tri-force of Courage. Zelda was given the Tri-force of Wisdom.
Link had used the Master Sword enshrined within the Temple of Time to fight Ganondorf. With the help of the Seven Sages, Link was able to seal Ganondorf's power within the Master Sword. The cycle had truly begun.
The cycle that Demise had created repeated every hundred years. Now, it has been a century since the last time Ganondorf was sealed. But this time, it's not just the seal on Ganondorf's power that is weakening, but the seal on Demise as well. And this time, there is a major twist. Link is reincarnated as a girl.