A Zelda story gone wrong. Things happened, Ganon(dorf) attacked, the Princess was captured, the Hero saved the day. And if the story had been just the story of the reincarnations of the Demon's hate, the Goddess, and the Chosen Hero, it would never have gone the way it did. But it was also the story of the bearers of the Tri-Force.
Theoretically, they might have a Rock-Paper-Scissors relationship. Power overwhelms Wisdom, Wisdom manipulates Courage, Courage topples Power. But they also have flaws. Power is prone to megalomania; Wisdom, totalitarianism and paranoia; Courage, recklessness and acting without thought. Power's flaws arose and were dealt with. Then Wisdom's came to light.
In the process of his takeover, Ganondorf had killed the king. Not an unusual act. Of course, this devastated the Princess, but she was able to deal with it, with the reliable Hero and her beloved nursemaid. But others within Hyrule saw an opportunity, a weak young girl ripe for manipulation. All they had to do was isolate her, and then swoop in. They didn't realize what a mistake they had made, as they were informed that the Princess's nursemaid had been killed.
With her dead, and signs pointing to someone of substantial rank and power in Hyrule, Zelda began to see the flaws in her kingdom. And more than that, she began to consider her situation, and those around her. And, as one is prone to do when left alone for a time, she thought, and thought deeper, and with the Wisdom she inherited from her predecessors and the distrust born from a murder, she imagined it all. She saw how everyone around, all those with any power, could betray her for their own personal gain, and she saw how much better off the kingdom would be if she simply had direct control. She was certain: all those within Hyrule's court were just looking for the right opportunity to betray her and seize power, so she should get rid of them and take absolute control for herself. It was for the best, really.
But what of the Hero? That was a different matter entirely. The Hero, a young man of the people, who came to her aid simply because he was asked, who fought unbelievable monsters to save her kingdom and asked no further reward, who stood between her and the King of Evil without fear or doubt. Whether it was based on his actions, or some lingering thought of her predecessors, there was one thing Zelda was certain of: Link, the Hero, would not betray her. That was an absolute truth, and in her mind, that meant he was the only one left in the world that she could rely on.
As for Link, he had largely returned to a normal life, still keeping in contact with Zelda according to her wishes. The Master Sword was returned to its place, though the other weapons he had acquired remained for battling the monsters that still occupied the countryside. And when the time came for Zelda to ask him for something, like her, regardless of whether it was entirely his will or something the other Heroes left behind, there was a simple belief: he would never have reason to refuse her, because if it's Zelda, then whatever she asks, she is not wrong. Holding onto that idealistic belief, when she reaches out to him, telling him the royal court is full of enemies, of course he will help her purge them.
And for a time, that was the way things went. The Princess, maddened by grief and paranoia and Wisdom not suited for one in her position, lashing out at all those around her she perceives as a threat. The Hero, believing in the Princess he saved, standing at her side as the sword to strike down those who threaten Hyrule, so he thinks. In some ways, perhaps Ganondorf would have been preferable.
Until something happens. Until Zelda does something, gives an order, and Link witnesses it and can't accept it. Finally, she has gone too far. No matter how he loves her, he just...can't continue like this. And he makes his resolve: he will stop her. Put and end to the tyranny and bring back the shining, radiant Princess he had first admired and adored.
Zelda...does not take it well. The idea that she might be in the wrong, or that Link was genuinely against what she was doing, couldn't even enter her mind. It must only be someone conspiring to hurt her, someone trying to take her beloved Hero away from her. He must be under some spell or curse or manipulation. She'll have him captured, and brought back to the castle, where she can restrain him and he'll be safe from her enemies, until she can break the magic on him so he'll be back to how he should be, serving and protecting and LOVING her, because he's the only one who won't try to betray her.
And after being chased, after relentless pursuit, Link finds himself cornered before the Master Sword, without a weapon in hand, with his pursuers much too close to pull something from his bag, certain they've finally captured their sovereign's hero. He can't even use the Sword next to him, they're certain. After all, it's the Sword of Evil's Bane, that can only be drawn by the pure of heart to strike down those who threaten Hyrule, right? Certainly, after the things he's done, the Hero cannot be pure of heart, and certainly the Princess cannot be considered an enemy of her own kingdom. However, there is another truth, lost to the mists of time: before "the Sword of Evil's Bane," before "wielded only by the pure of heart," before any of the other legends, it still was not just a sword. And even all these many years and centuries later, even with her original purpose fulfilled, even in the depths of her slumber, Fi will not deny her master.
So, with Master Sword in hand, the Hero must set out to stop the Princess, to save the woman he loves from the depths of madness that have consumed her, even as she is prepared to burn the world to destroy the enemies only she can see threatening her and her beloved.