Back at 221 B Baker Street, Sherlock sat thinking about all that John and Mycroft had told him. "So... I have a twin sister?"
"Yes." Mycroft replied.
"And she is..."
"My girlfriend." John finished his sentence.
Sherlock's previous looks of disbelief and shock were replaced by his cool calculating mask and he held out his hand "Let me see the picture, her jacket and the box that they came in."
Mycroft handed him the jacket and the picture, and John gave Sherlock the purple box.
Sherlock felt the inside and outside of the box and found nothing. He searched the pockets of her jacket and found a picture of John and Serenity kissing in a cafe taken by John on his phone.
"That was our one year anniversary, about six months ago. We went to have some Italian and watched a few movies at her place that night." John smiled at the memory.
He also found a map of London and all of the burroughs in another pocket.
He looked at the photo, noticing how similar they looked to each other. He flipped it over and found a message.
'She's very pretty and feisty, just like you Sherlock. If you can find her using my clues, you can have her back. If not, I'll keep her for something special.
~JM'
Sherlock breathed out a sigh and placed the photo on the table with the note facing up. He straightened himself and said the one word the other two men hoped never to hear "Moriarty."
"Shit." John tried to comprehend all of the implications of what he just heard.
Mycroft however, did. "No." he moaned as he sank into John's chair with his hands covering his face. "He'll break her before he lets us find her." He looked at both John and Sherlock before speaking again "I'm sending out my teams."
"No." John said it so quietly that both brothers turned to look at him, surprised to see him hold so much control over his emotions. "We are going to find Serenity ourselves this time."
"John, we are not heroes. Ok, You are a hero. Me and Mycroft?" He pointed at himself and his brother "I'm hated by almost everyone I meet and Mycroft hates legwork. Do you really want to do this?"
"I don't care if I have to go in alone, but if you two geniuses tell me where I need to go, I'll do the rest." John laid out the map of London from Serenity's jacket on one wall and tacked it down.
'We have to wait for the next clue to start our search." Mycroft said as he walked towards the kitchen. He called back over his shoulder 'Maybe John can tell us about some of his dates with our sister, Sherlock."
"Or we can use this rare opportunity to play Cluedo."
"No, Sherlock I'm not going to play Cluedo with you and your brother. I don't want to have a massive headache."
"Then let's all retire for the night and see what happens in the morning." Mycroft returned to the main room and said "I will be back tomorrow morning with food, and hopefully we will have answers by tomorrow night."
John and Sherlock both went to their rooms. One stared at the ceiling of his room wondering about how he was going to find his sister, and what she'd be like while the other paced his room worrying about his girlfriend. He'd planned on proposing to her soon. He sat down at his desk with his laptop, opened his blog and made a new entry called 'My Girlfriend Serenity' with a picture of himself and Serenity at a pub laughing over something one of the two of them said.
He started typing 'I've been debating whether or not I should post this for over a year, but it's been taken out of my hands. My current girlfriend Serenity and I have been dating for over a year and a half. She's the most amazing person I've ever met, and probably the only one who understands everything I've gone through both as her brother's blogger, and as a soldier.
Quite by accident I found out that she's Sherlock's younger twin sister. Please don't ask, I can't go into details about how I know, but let's assume that a part of the British Government forbid me from telling Sherlock. They were separated at birth due to some unfortunate circumstances and Sherlock never knew her. Tonight, Mycroft and I were forced to tell him about her because we need him to help us find her. She's gone missing and we need to find her.
If anyone sees her, please tell me or Sherlock. She's my world. I was going to propose to her on New Year's Eve, but now I don't know if I ever will be able to.'
John posted his new entry and closed his laptop with a sigh before walking over to his bed, hoping that with sleep will come answers and hope that she could be found.