Author's Notes: This is our first time writing fanfiction together, so constructive criticism is very much appreciated.

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The world, for a split second, seemed silent. No-one spoke, no cars drove by, no whirr of machinery or a pained birdcall.

Admittedly, that moment was so short that no-one, not even me, noticed it. And even if they had, I would have been the one to break it, because I took one final deep breath before ducking under the tape, its cold, yet strange manufactured texture sticking itself to my back.

Considering the importance- or, perhaps more accurately, relative importance of the crime, there were no officers outside of the shop. A sigh escaped my lips as I opened the door, and was greeted with the victim, lying in a small puddle of his own blood.

There was a body of a man, aged around 30, with a hole in his head. A recent suicide had happened here, or so the police thought. It was obvious- to me at least- that it was a murder.

You could tell by the markings on the left hand of the victim that he was left-handed. Yet the gun was in his right hand and the bullet was in the right side of his head. The shot was too clean for him to have shot himself with his weaker hand. It didn't look it had been shot at close range either. By the look of the bullet hole, he was shot by a sniper rifle, not by a pistol, like the one he had in his hand.

I walk up to the policeman who seemed in charge, his mind focused on a telephone call.

"Just get here now!" he yelled into the phone. He slammed his finger onto the neon red phone on screen, his eyes glaring at an invisible target, shifting from side to side until they noticed me.

"Excuse me, Miss, but you're not authorised to be here." He said, forcing himself to talk calmly as if nothing had happened. But you could see that he was furious, by his breathing pattern and the vein practically popping on his forehead. I looked him over. Problems with wife, particularly her threatening to kick him out. He was easy to deduce- in some ways, not even trying. "Miss, you need to leave! You are not auth-" I cut him off.

"Not authorised to be here. I know. I just want to know who you think killed him." The officer just looked at me, confused.

"Mis-" He started before I cut him off again, raising my hand to his eye level.

"Ty. Miss sounds too lady-like and formal." He just stared at me, stepping cautiously to the right before continuing.

"Ty, it was a suicide. Not a murder." I just smiled at him.

"Oh, Greg Lestrade. No. No it's a murder."

"How do you know-" He tried to say. "It says it on your badge, in your bag. You should keep that closed. Don't know who might be looking." I smiled at him again.

"Now, back to the murder! Quite simple actually..." I told him my observations, then left him there looking dumbfounded. "Oh and buy her some roses! Not tulips or something, no, roses. Romantic. She wants you to be more romantic!" I called over my shoulder. I smiled to myself as I walked. First day in London and I had already solved a case.

Sherlock's POV

I was bored.

There had been no cases today. So I sat there in the living room of 221B, playing my violin.

"Sherlock!" I heard John yell from the kitchen. "There are hearts in the fridge! Hearts!" He yelled, coming into the living room.

"Just an experiment. Don't worry." I said calmly stopping my violin playing.

"Don't wor- don't worry?! There are hearts in there! Next to our food! It's disgusting!" He glared at me, before sighing and sitting down. We sat there in silence, when my phone went. I looked at the caller ID, seeing it was Lestrade. I jumped out of my chair. Finally- a case!

"Yes?" I said.

"Sherlock! We've got a dead body down here. Seems like a suicide but-"

"You want me to make sure." I said cutting him off.

"Well yeah that too, but John said you were bored... Will you come?"

"Hmm… I'm not sure I have a lot to do…"

"Sherlo-"

"I mean I have experiments and I ne-"

"Just get here NOW!" Lestrade yelled before hanging up. "Rude." I muttered.

"Who was that?" John asked.

"Lestrade. We've got a case!" I replied.

"Finally!" John said, he seemed bored too.

I hailed a Taxi, and told the driver the address that Lestrade had texted me. When we got there, I found a very confused looking Lestrade. "Details, Lestrade! I need details!" I told him, as I walked up to him.

"It doesn't matter…" He murmured.

"What?" I asked him, confused about what I thought he said.

"It doesn't matter!" Lestrade shouted, now annoyed.

"Why not?" I asked him, confused.

"Some girl, waltzed in here and solved the case! Even found out who "murdered" him! His boss! Apparently he found out some secrets the company was hiding!"

"For fuck's sake..." John said under his breath. He was annoyed, but I was more. I hadn't had a good case for days. Back to being bored.

Great.

"Who was this girl?" I asked, pissed off that some girl came here and solved my case

"I don't know!" Lestrade nearly shouted.

"Then describe her!" I shouted, getting rather annoyed.

"OK! Her name was Ty! She had dark brown, medium-length, wavy hair. And light blue eyes. She was taller than average but not too tall. She wore a light blue T-shirt and brown jacket and black jeans." He said, looking at the ground. Suddenly he rose his head with realisation in his eyes. "She was like you!" he exclaimed. "Her deductions were like yours! And she seemed really smug! Like you! But she smiled. More than once. Unlike you." John chuckled at that last bit. I glared slightly at him.

"So was she just a fangirl? Someone trying to be like me?" I asked

"No no no! She seemed really smart! She was observant. She knew about the argument I had with my wife! And she gave me advice! Oh- and when your name ever came up around her, she didn't seemed fazed at all! As if she didn't know who you were!" he said.

"So she probably just moved to London…" I murmured.

Neither Lestrade or John seemed to have heard me.

Some time later back at 221B.

We went home and I ran straight for a laptop, so I could find out all I could about this "Ty". I inwardly growled in frustration, as nothing relevant came up about her or nothing at all. Just stuff about an a toy company or some record producer.

"That can't be her real name," I muttered.

"What?" John said, sitting across from me. I had completely forgotten that he was there.

"Ty isn't her real name." I said, my mind rushing trying to figure it out. What is her real name? Why did she use a fake one? Abbreviation maybe? But an abbreviation of what...

"You're getting too caught up in this, Sherlock, you just have to accept that someone beat you to it!"

"No! I have to find out who she is! Don't you see, John! This is my new case! Finding out who this girl is, it's my new case! It's perfect! Something for my mind to do!"

"Great," John said, sarcasm dripping from his voice.

12 hours later.

"I don't understand! Who is this girl?" I yelled.

"Look, just admit you need help with this!" John said, now thoroughly fed up with me.

"Fine! Just to make you happy!" I muttered.

"Yeah, that's why your getting help, for me…" John said under his breath. I took out my phone, and opened it up. I sigh before I dialed Mycroft. I don't like doing this. Asking my brother for help. I don't need help! It rang once before he pick up my call.

"Hello brother, to what do I owe this 'pleasure'?" Mycroft answered.

"Not now, brother. I need...help." I reluctantly said. I could Mycroft chuckle through the phone. I sighed. This was going to be tedious…

"Really? The great Sherlock Holmes needs help? And from his own brother! My my, Sherlock! Is it girl problems?" He said, his voice tinged with sarcasm. Unfortunately it kind of was…

"Mycroft! Look, I need you to find out the identity of this girl, see sh-" I started before Mycroft cut me off.

"Sherlock! Stalking? I didn't think you'd stoop THAT low!" He said mockingly.

"Shut up, Mycroft! She solved my case! MY CASE!" I shouted, acting slightly childish.

"Oh no! Not your case! Whatever shall we do?" He continued to mock me.

"Look, will you just do it!...Please…" I said, going quiet at the end.

"Manners! From Sherlock! What's next, flying pigs?!" He said, almost breaking out into a laugh.

I sighed.

"Fine, I'll help you." He said, noticing that I was serious.

"Thank you, Mycroft" I murmured

"You're welcome, brother." He replied.

I hung up and texted him the little info I had on her, I then waited for Mycroft to send me the details of Ty or whatever her real name was. "See that wasn't so hard, was it?" John said smugly.

"Yes, actually, it was" I snapped.

Some time later.

My phone went off, telling me I had a text. I grabbed my phone, hoping it was Mycroft. Mysteriously, all it said was:

You need to see this, I've sent a car to pick you up. -MH

I looked at it confused. What did I need to see? I heard a car pull up outside. I called John and grabbed my coat. I walked quickly out the door.

"What's going on?" John asked struggling to keep up.

"I don't know." I replied, getting into the black car.

"That's Mycroft's car,"John stated, confused as he got in. I ignored him , as John looked at the man sitting across them, in the car.

"And that's Mycroft..." He said. We both ignored John and started talking.

"So who is she?" I asked.

"Well, she is 28, turning 29 on the 31st of october. She recently traveled here and is looking for a place to stay. She's just finished her masters in Criminal psychology and her degree in English at Harvard university." Mycroft stated. He fidgeted uncomfortably in the seat.

"Yes, that's all very good. But why am I here? What's so important that I have to come here?" I asked, nearly yelling.

John just looked at us, confused. But unfortunately, before Mycroft could answer we arrived. Mycroft stepped out of the car and steadily walked into the building and into his office.

"Mycroft!" I yelled trying to catch up with him, John following steadily behind. We entered his office and I slammed the door behind us.

"Answer me, brother! Why is she important! Who is she?!" I shouted at him, thoroughly pissed off. "Sit down." He almost whispered. I sensed something was wrong and sat down. John joined me on the surprisingly comfortable sofa.

"Sherlock, 27 years ago. Someone broke into the Holmes house and stole something. Something very valuable. More valuable than any jewel, any artifact or antique. Something so valuable that the Holmes were never the same again. You don't remember this though. You were around 2. I guess it's good that you don't remember. But I do. I remember that night. I couldn't forget…" Mycroft tailed off, I had never seen him this upset.

"What did they take, Mycroft?" I asked, for once not knowing.

"Sherlock…" He whispered. "They took our sister…" I just looked at him. I don't have a sister… This… No. He must be lying! But… he wouldn't lie about something like this.

"Sherlock doesn't have a sister! He can't have a sister!" John said, just as confused as me. "He can't have a sister he doesn't know about! Thats ju-"

"What was her name?" I asked, almost whispering.

"Tyanna, Tyanna Kaelyn Racquel Holmes. Also known as Ty." Mycroft slowly said

"Heh, outdone by your little sister!" John nervously said, trying to ease the tension.

No...no no no! I don't have a sister!

"Where is she?" I asked. I had to meet her!

"We don't know. But as soon as she finds somewhere to stay, we will!" Mycroft replied, also wanting to meet her. I had to find her, but where would she be…

Jim's POV

Well that went well.

I walked away from the burning building. Someone had forgotten to pay a debt they made with me. I dealt with them. Everyone thinks it was just a gas leak. Oh, ordinary people. Aren't they adorable? I had to wear casual clothing today, bit suspicious there being a man in a suit watching a building that was about to explode… So jeans and white t-shirt it was. I didn't wear my hat today, I had also not slicked my hair back. Needed to look casual but I didn't particularly like hats.

Well- not the ones I owned. Have to get some new ones… I was walking down a street, grinning at a far-away speeding car that seemed out of control. I wonder if it will hit anyone? I looked around and saw that the street was empty apart from a young woman. She was listening to music and seemed oblivious to the world. But there was something different about her…

I noticed a few scars on the little exposed skin. Scars usually had stories, and I loved stories. I considered saving her, but was I really that bothered? I looked at her closely; she had dark brown, wavy hair similar to Sherlock's. She wore a brown, medium length jacket, a light blue shirt, black jeans and black boots. I noted that the boots didn't have heels and were practical for running. This girl had a past. A good one. I looked at her face and saw bright greenish-blue eyes and highish cheekbones. I saw her smile briefly at something. I had decided then and there that I would save her.

"Miss!" I yelled and ran towards her knocking her out of the way of the car that had just arrived. Well that was close!

I watched her as she watched me. She reminded me a lot of Sherlock, hopefully she was as interesting! "You need to watch where you're going, Miss." I said, smiling.

"Thank you, I'm usually really observant… But I guess I've got a lot on my mind." She replied. If she did have a past, I'm guessing she recently escaped it. I tried finding out anything by just looking, but found it hard. That's… different.

"It's okay. You have to be careful though, you never know what might happen. I'm Jim, by the way!" I said cheerily. Then cursing inwardly at using my real name. I've never slipped up when it came to introductions! Why was it different with this girl?!

"Ty." She responded, smiling. I offered my hand to her, which she took obviously expecting to shake but I brought it to my lips. She looked surprised for a brief moment but then hid it. Well. She was used to hiding her emotions… I then realized what she said. Ty?

"Pleasure to meet you, Ty. What's it shortened for?" I asked, still smiling.

"I don't know. They never told me. They only called me 'Ty' or 'girl. One guy constantly called me Princess..." She said, suddenly looking distance. I noticed a slight wince at Princess.

"Who are 'they'?" I questioned, wanting to know more.

"The people I grew up with…" By the way spoke, it sounded like a bad memory.

"I'm sorry if this is a sore subject, but what about your parents?" Perhaps they died? Murdered maybe?

"Never knew them… I didn't exactly have a normal childhood…" I wanted to know more and it sounded like she wanted to talk.

"Why don't we get a coffee, so you can talk more about it, okay?" I asked, thoroughly intrigued with her story. I offered my arm, which she took smiling.

Ty's POV

I waved goodbye to Jim as I stepped out of the coffee shop, feeling giddy with happiness and excitement.

I supposed it was partially due to Jim, but the second reason was that as we talked, I flicked through a newspaper that had been discarded on our table and had discovered an apartment at a good price.

I walked down the road to the apartment, with a new spring in my step. That conversation with Jim left me unusually happy! I didn't quite know why...

I slowed down, finally reaching the apartment. I raised my hand to ring the doorbell…

Sherlock's POV

After having a LONG discussion with Mycroft, John and I went home. I sat down and looked at the folder on Tyanna, that Mycroft had given to me. It had some pictures of her in it. The more I looked at them, the more I noticed the resemblance. I couldn't believe that I couldn't remember her. She was my sister!

How did I not know?! How could my parents not tell me? Why was she taken?

I just sat there with my head in my hands, with so many questions swimming around my head .When the doorbell went. I continued to just sit there. John or Mrs Hudson could get it. I wasn't in the mood. "I'll get it then!" I heard John yell. I heard him open the door and then silence. "Hi! I'm here about the apartment, 221c?" I heard a young woman say.

"Sherlock!" I heard John yell, he sounded shocked. Who was it? It didn't sound like Irene, or Molly or anyone I knew… I headed towards the door. "Sherlock!" John yelled again.

"I'm coming! I'm com-" I started to say before I saw who was there…

My sister.

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