AU meme - The final problem is Rose Tyler.
She hailed her taxi, having just come out of a huge meeting, eager to get home to John. She was starting to finally get to grips with this parallel universe, and even had the faintest hint of a smile on her face as she looked through the window of the cab.
"No charge today, honey," the kind Irishman with mad eyes said.
She thanked him, grinning to herself. As they made their journey, he joked along with her, asking her if she had heard about the recent Reichenbach case. “Yeah, actually, Sherlock’s my friend. Well, I say friend..”
"Sherlock Holmes doesn’t have friends. He has conquests," the man hissed. She laughed awkwardly, only realising he had taken a picture on his phone when she heard the click. "Back off, mate," she scolded, freezing as pulled a bottle out of his pocket. He sprayed it in her face and she fell into darkness.
Sherlock froze as the screen changed from an advert for the local jewellers to a picture of a blonde woman. “Rose..” he breathed. His breath hitched in his throat as an all too familiar voice swam across his ears.
"You know what you have to do to save her.."
“You don’t have to do this. I’m a big girl, I can look after m’self,” Rose implored as she sat in the hotel room’s bathroom she was sharing with Moriarty. She knew he was waiting outside, goodness knows what with, but she couldn’t let Sherlock do this. Not now.
Sherlock laughed sadly, tears streaming down his face. “Of course I do. There’s only one thing I ask of you, Rose. If you see John. Tell him, tell him….” he trailed off and Rose could hear him muttering to himself. “Oh, he knows..”
"Sherlock? What d’you mean? Tell him what?"
"I promised a very good friend…a long time ago, I would never let you get hurt. So this is what I’m doing. I’m keeping that promise. Goodbye Rose Tyler.”