Grey Dawn Breaking (джен)

Spirits are dangerous, powerful, and unpredictable. That's why the Avatar acts a bridge between the worlds. That's why the barrier is respected. And why deals in Spirit Tales always, always go wrong. But the fools in Mother's tales were weak, and Father demands perfection. And the way to achieve perfection is to do it over until you get it right.
The Great Spirits rarely interfere. They are the laws of the world, the harmonizing balance that exists every day, in every place. So long as even the chance of the Avatar succeeding remains, they are content to watch. But a deal between a powerful bender and an ancient spirit is a threat to their harmony they cannot ignore.
But fate has aligned in their favor. Loopholes and old powers combined allow them to to give balance a chance. And while the dealmaker starts her second chance on the morning of the Winter Solstice, with the Avatar's help her opponent starts his in the evening.
Now Zuko just has to convince Uncle Iroh to believe him, the Gaang to trust him, and his crew that he’s not possessed so that he can help Aang save the World, the Fire Nation, and his sister from the consequences of her actions.