Where No Shadows Fall (гет)

“If I do this, you won’t have done anything, Harry. You won’t exist. You’ll probably never exist.” Hermione coughed roughly, the damp irritating her lungs. “None of this will have happened.”
Hermione has lost everyone and everything in the war. Left with only one terrible choice, she honors Harry's sacrifice and goes back to change history - back to when it started, back to Hogwarts, and back to the dark days of the first Order. With no friends or allies, she finds herself at the mercy of a very different Albus Dumbledore and must carry out her mission in the face of another great wizarding war. Can she manage to fight her own demons and offer life to another? ca1926
Goes AU somewhere in the middle of Book 6. It will be obvious as the story develops.