As a child Maryn Moriarty was in awe of her older brother, he was so smart, so charming, such a fantastic role-model, she idolized him. She loved Jimmy and always thought that he loved her, he's always call her Mary, she always pretended to hate it but secretly he was pleased that he had a special nickname just for her. Though she wasn't blind she could see that he was frustrated that his parents ignored him and that no one ever recognized how truly brilliant he was, aside from Maryn of course. As they grew into their teenage years Maryn's admiration for her brother never lessoned though he became more and more angry at the world and his family though he did his best to make sure that Maryn never saw that side of him, but Maryn was no idiot she saw her brother when he thought no one was looking, but she was biased and despite it all still loved her brother.

Before Maryn reached her fourteenth birthday her parents got a divorce, it wasn't as if no one had seen it coming it was an obvious event but Maryn still took it hard while Jim seemed unaffected by the sudden change in home life. Her father left the country leaving Maryn and Jim with their mother, everything was relatively normal for a few years, except for the fact that Jim was putting more and more distance between her and him, until their mother suddenly fell ill and died shortly after. Maryn was once again devastated and Jim was once again apathetic. Though they attempted to contact their father he never returned, by that time Jim had gone to university but since their mother was gone he had to drop out to work to support himself and Maryn.

When Maryn turned 18, Jim suddenly was gone, he just didn't come home one day. Maryn called the police all the family friends anyone who might know where Jimmy was but no one did. Every month Maryn received a check for 5000 dollars, in an unmarked envelope in the mail, which was more than enough to sustain her and the house, for it was almost paid off but Jim still never came home, the only proof that she had that he was alive was the checks she received every month

Maryn, by then, had realized her talents with computer, she quickly became proficient at it and began hacking, it started small but quickly escalated. Before her brother disappeared on her the government had caught her hacking into a government project that was less than legal, seeing that she was young and wasn't in the best situation they let her off with a warning and her word she would never hack again or the punishment would be far more severe, her brother was never informed of this. Until this point she had never had a specific reason to hack again, but she wanted her brother back and she would do anything to make that happen.

She started hacking again, quietly so she wouldn't raise any suspicion; she scoured the world's computers for any evidence of her brother's existence. Finally, after months of endless work, she got a hit; there he was, on a security cam in the heart of London. She didn't know how but he managed to find out that he was detected immediately and it didn't take longer than a half an hour before there was eight men banging on her door and then knocking it down not bothering to wait for anyone to answer. They dragged her, kicking and screaming, out of her parent's house and into a plane, her first private plane ride of many.

And, for the first time in 8 months, she saw her brother. He was different than he was before, sure he was still charming and brilliant but the life had left his eyes, as if he could no longer see the joy in the world. Once the situation was explained, Maryn was surprised to see her brother delighted, she of course was still furious with him for leaving her but he seemed to want to forget about all of that. He told her that he'd set her up with a position at his 'business' she could hack all she wanted. She wanted to be so angry at him, she wanted to make him suffer, she wanted to hate him, to scream and yell at him but she was so happy that she had her brother back that she kept all that anger inside. She agreed to work for him, she of course, quickly realized what the 'business' was actually but she was with her brother again and she was focused on the fact that it might be like old times and she forgot about all the other rough edges.

Years went by and it was never like the old times, but at least now she could see her brilliant brother and sort of pretend they were a family. The anger at him never did go away and began bubbling up at little things, her automatic emotional response was anger, and even little things could make her blow up. She hated that this was who she was now, she hated feeling angry all the time and doing things that the back of her mind occasionally reminded her were against laws, not to mention morals. She needed something to change then, something did.

Sherlock Holmes. Sherlock Holmes, her brother's equal. Sherlock Holmes, the great consulting detective. Sherlock Holmes, the one who opened her eyes. Up to that point she'd never had a problem with what she was doing but then she was told to research Sherlock Holmes and she saw the other end of everything her brother's 'business' accomplished. She saw what Sherlock Holmes did, and she saw it was a lot better than what her brother did.

She watched the plan to destroy him formulate in her brother's mind and it scared her, she couldn't allow this to happen, she wouldn't. That's when she found a way to fix it, there was no way she could every convince her brother to change even one detail of that plan so she'd have to fix it from the other end, the Sherlock Holmes end. She knew the only way to save both of Sherlock 's and what Moriarty referred to as his 'pet's' lives was to split them up. So she did what she had to do, she went behind her brothers back.

She tried to warn Sherlock but there wasn't enough time, so she decided to try and protect them both she ran them ramped all of over Europe. She involved her best friend Hennery, she argued with Sherlock, she got angry a lot and she accidently fell in love with the 'pet' John. That was the stupidest thing she'd ever done and that's saying something. Then she got caught. Her brother found her out. And now she was here, locked in a room, awaiting her fate. Waiting for the man who ruined her life, who also happened to be her brother, waiting to hear the screams of Sherlock and…John. She was Maryn Moriarty, and she was scared.

A/N: I thought I'd write a bit of a backstory for Maryn and her brother, hope you all don't mind. Please, please, please review, I'd really appreciate the feedback, and then I shall get a new chapter up soon!