The darkness and his little ray of light

What happened all those years ago during the war? What if it was all a lie? What would happen if you were to find out it was only hermione who was taken by the snatchers? What would happen if you discovered the real reason why the Dark Lord kept Fenrir Greyback on his side? What would happen if you discovered how the Dark Lord actually died?

The students all then go back to Hogwarts for their final years. When things go south, how far will they go to return things back to normal and to stop another war arising.