The following in italics is an excerpt from Harry Potter and the Deathly Hallows by JK Rowling, and afterwards is where I take the plot into my own hands. I will twist the story a little bit to fit in with the plot I have in mind, but will try to make it as close to the real thing as possible.
Disclaimer: I don't own Harry Potter
The Beginning
Bellatrix laughed, the same exhilarated laugh her cousin Sirius had given as he toppled backward through the veil, and suddenly Harry knew what was going to happen before it did.
Molly's curse soared beneath Bellatrix's outstretched arm and hit her squarely in the chest, directly over her heart.
Bellatrix's gloating smile froze, her eyes seemed to bulge: For the tiniest space of time she knew what had happened, and then she toppled, and the watching crowd roared, and Voldemort screamed.
Harry felt as though he turned in slow motion; he saw McGonagall, Kingsley, and Slughorn blasted backward, flailing and writhing through the air, as Voldemort's fury at the fall of this last, best lieutenant exploded with the force of a bomb. Voldemort raised his wand and directed it at Molly Weasley.
"Protego!" roared Harry, and the Shield Charm expanded in the middle of the Hall, and Voldemort stared around for the source as Harry pulled off the Invisibility Cloak at last.
They yell of shock, the cheers, the screams on every side of "Harry!" "HE'S ALIVE!" were stifled at once. The crowd was afraid, and silence fell abruptly and completely as Voldemort and Harry looked at each other, and began, at the same moment, to circle each other.
"I don't want anyone else to try to help," Harry said loudly, and in the total silence his voice carried like a trumpet call. "It's got to be like this. It's got to be me."
Voldemort hissed.
"Potter doesn't mean that," he said, his red eyes wide. "That isn't how he works, is it? Who are you going to be using as a shield today, Potter?"
"Nobody," said Harry simply. "There are no more Horcruxes. It's just you and me. Neither can live while the other survives, and one of us is about to leave for good..."
"You dare to think that you will be the one to defeat me?" hissed Voldemort.
"Yes."
That was all it took to make Voldemort swell in rage; that one simple word was enough for him to be the one to cast the first curse. The dueling began in earnest, and both sides were casting their spells wordlessly, so the only indication of which curse was being sent was the color of the beams being emitted from the tip of each wand.
The duel didn't last for very long. In the end, two beams of light connected, a yellow one from Harry and a green one from Voldemort. But since neither one was using their original wands, the ones with the brother cores, there was no Priori Incantatem. There was only the expanding of the green light, the overpowering of it until the yellow light was consumed. The green light rushed towards Harry and completely engulfed him. For a moment, he glowed green, but it soon faded. And Harry James Potter fell to the ground, dead.
The result was absolute chaos. Death Eaters that had only been unconscious were now rallying to Voldemort as he laughed maniacally and shouted to the world of the "foolishness of that pathetic boy." The battle began once again, but now the fighters for the Light were fighting with both rage and grief fueling their attacks.
But no matter what they did, they could not deny that they were losing. Their hope, which had soared at the appearance of Harry, had now completely abandoned them. But they didn't care. They knew they were going to die, but they were going to take as many Death Eaters with them as possible.
At least, that's what Hermione Granger and Ronald Weasley were thinking. They had lost their best friend, and they suddenly no longer cared for their own lives. Oddly enough, the only thing they cared about was the life of the other.
Hermione was in the middle of a fierce duel with one Death Eater while Ron was behind her fighting another. She didn't see what had happened, but she heard his scream as the Killing Curse took away his life. Her breath hitched, her heart stopped, and she whipped her head around to see Ron fall to the ground, glowing green like Harry had done minutes earlier. And all she could look at were the sightless eyes of the person she loved. She did not know if she was in love with him, but she knew that she loved him as a friend. One of the best friends someone could ask for. The person she had only a few hours ago kissed for the first time. Her only remaining best friend.
And that was when the Death Eater she had been battling with and the Death Eater that had just killed Ron had chosen to attack her. Their spells hit Hermione at the same time, and the force of them lifted her off of the ground while her eyes were still trained on the body of the youngest male Weasley. Her entire body glowed gold for a split second, and then, with no warning, she disappeared.
Hermione fell to the floor with a Thump! Her eyes were closed tightly, the tears escaping from her eyelids and streaming down her face. All she could feel was pain. This entire year she had been on the run with Harry and Ron, fought with them, spent entire days with them, and now they were dead. Hermione gave a small sob crawled over to where she thought Ron's body was, still refusing to open her eyes, not wanting to see what she knew was undeniable. She wanted someone to kill her now. There wasn't any point to being alive.
Hermione finally stopped crawling and curled up into a ball. It didn't register in her mind that she should have been attacked by now. She simply let her emotions take over and she wept.
A few minutes later the tears began to lessen. Hermione took great gulps of air, trying to gain control of herself. She finally opened her eyes and looked around for Ron's body, wanting nothing more than to curl up next to it and die. Except... the Great Hall was empty. The four house tables were set up in the way they were before the battle had ever started. There were no craters in the walls were spells had hit them. There were no burn marks. Most importantly, there were no bodies.
Hermione stood up quickly, wiping the tears from her eyes. Was it all a dream? Did this entire year never happen? She turned around slowly, examining every inch of the Great Hall. She smiled. I don't care if this means I'm going crazy! She thought with new tears, now those of happiness and relief, fell from her eyes. If being crazy means that Harry and Ron are alive, I'll gladly lock myself in St. Mungo's!
Believing that it was all a dream kept Hermione going. She quickly picked up her wand, which had fallen to the floor, and began to head for the doors, slowly picking up speed until she was sprinting out of the Hall, down corridors, up staircases, and to the Fat Lady's portrait. She stopped there, panting for breathe with her hands on her knees. In the back of her mind it registered that there were some paintings missing from the walls, that there were some she didn't recognize, and that many suits of armor seemed out of place. But she ignored it.
Hermione then looked up. The Fat Lady wasn't in her portrait. Shoot! Now what? I need to see Harry and Ron, make sure they're alright! NOW!
"Excuse me, but may I ask what you might be doing here?" asked a disconcertingly familiar voice.
Hermione froze. She knew that voice, but that was impossible...
She spun around, pointing her wand at whoever it was.
And gasped.
Standing in front of her, complete with the long white beard, half-moon spectacles, twinkle in the eyes, and obviously alive, was Albus Dumbledore.
