Disclaimer: I own nothing of Sherlock BBC and this story is loosely based on Big, a Korean Drama

Molly was shaking so Sherlock managed to find (steal) a doctor's surgery outfit for her. Sherlock decided it's time to tell Molly the truth even though he should not be the one to tell her that.

"Molly, do you remember you have a sister?"

"Barely. She ran away from home when I was young. Why?"

"Irene Adler hired me not long ago to find her long-lost sister, which is you Molly. Today she went to look for you to tell you that." Sherlock looked at her, afraid that Molly might react violently to this news.

"She's still alive right? I want to see her. I want to see my body." Instead Molly seemed to take the news well and calmly requested Sherlock to bring her to her body. Though one should never see things only at the surface. Irene Adler told him some things about their family. Molly tried hard to cover the wounds from her past but from his own experience, Sherlock knew it would catch up on them eventually. Without a word, he led Molly to the ICU.

Inside, the doctors and nurses were busy with checking the patient and adjusting the machines. Seeing her own body lying in the hospital bed yet Molly knew she was standing outside the room in another person's body was surreal to her, detached even. Like all of this was happening to someone else and not her. Suddenly, Molly couldn't take it anymore. She needed to leave this place now so Molly ran with all her might, hoping in the process to escape from her past if possible.

Molly was stopped by Sherlock once they got out of the hospital entrance so she didn't get run over by the traffic. Out of nowhere, shots were fired as people scrambled for cover. Sherlock pulled Molly into his arms, shielding her. Faster than her mind could turn, a car arrived and Sherlock dragged Molly into the car with him and it drove off quickly, tyres screeching.

Dazed, Molly shook her head when Sherlock asked if she was injured.

"Those were the people trying to kill Irene Adler. So was the car accident, another assassination attempt." Sherlock answered Molly's unspoken question but why would they want to kill her? Right, she's Irene Adler now and now all the more they would want her dead after seeing her coming out alive from the car crash.

They didn't know Molly and Irene Adler have swapped bodies. So now she not only swapped bodies with Irene Adler, Sherlock's lover and just found out that she was her sister, now people wanted to kill her because she's in a body not of her own. Great.

Molly looked up when the car stopped. She's been here before, to plan Sherlock's 'death'. This was Mycroft's office building. Molly couldn't help but smiled as she met another familiar face. Anthea informed her that Mycroft was waiting for her and stopped Sherlock from going in with her. Surprisingly, he obliged but not before giving a look to assure Molly. She nodded and entered.

"I'm very sorry for what happened, Miss Hooper."

"You know I asked you to call me Molly long time ago, Mycroft." He always had a strong presence; she guessed that was a quality needed for being the British Government and weirdly, it relaxed her to some extent. Like everything was under Mycroft's control.

"Apologies, Molly" He gave a small smile and she returned it. "I'm sure Sherlock has already informed you that we are working on it to swap your bodies back. Unfortunately, this was not the first time it happened and the reasons varied. Because each case is unique, finding the correct solution to the problem takes time. Let's just say your sister was in a dangerous situation where people were trying to silence her for the information she obtained. She obviously did not learn her lesson. For your own safety, you could not stay in London. I have already arranged your accommodations in Sweden. You would stay there till the matter has been taken care of. We would watch over you, Molly and your body too. Don't worry."

"You knew long time ago that Irene Adler is my sister, long before Sherlock knew."

"I needed to know who the people in Sherlock's life are." It was not a question so Mycroft did not answered it but nevertheless he explained why.

"So you knew the full story about my family, about my life?"

"Yes" This time Mycroft did answered it.

"So you know how it felt like then? Living as a shadow of your sibling?" Molly quickly looked up from her lap, shocked that she even asked this. "I, I'm sorry, Mycroft. I didn't mean to…" Molly tried to take back what she said.

"It's fine, Molly. I could only imagine what I would do if I swapped bodies with Sherlock. Take it as an advice from the experienced, just get used to it." Molly smiled to herself. Did the British Government laughed at his own expense to cheer her up? If only she can record this down.

"Thank you, Mycroft." Like what she had initially planned, Molly was still leaving London today but not to Edinburgh but to another country and who knows for how long. Self-imposed exile, it seemed like to her.

"Safe journey, Molly. The plane is leaving in an hour."

Exiting Mycroft's office, Molly saw that Anthea brought the luggage from her flat that was meant for Edinburgh. What a twist of events. Molly looked around the hallway. "Sherlock has left." Nodding to Anthea, Molly went straight to the car that was waiting for her. "Goodbye, Anthea." Molly didn't really want to leave but she had no choice. "Take care, Molly." She wondered how long it would take to hear others call her by her real name again.

Since Molly could remember, she felt like that she was overlooked by her mother as if Molly was not her daughter too. Her sister used to be sick so most of the time, Molly played with herself since her mother was busy taking care of her sister while her father was busy working all the time.

All of a sudden, her sister gotten really sick and was brought to the hospital. Apparently, she needed surgery and for some reason, Molly also had to go for surgery to save her sister, at least that's what her father said. After the surgery, her mother seemed happier and even spent more time with Molly. The surgery hurt a lot but Molly was glad because the pain made her mother loved her more so it was worth it.

Then one day her sister ran away from home and never came back. Her family collapsed overnight just like that. Her mother fell sick right away. The doctor told them that it was not a physical illness but a mental one. Molly was too young at that time to understand what it meant but every day she stayed by her mother's side who now laid in bed all the time and tried very hard to entertain her by retelling what happened in school. Molly did not recall her mother even acknowledging her from that day onwards.

Molly saw how her mother literally shrunk from the longing of her sister. She suffered for few years before she died. Then shortly her father was found out with stage 4 cancer and passed away soon after. Molly cried the hardest when her father died. Not that she did not feel sad for her mother's demise, it's just that she knew her father loved her as much as her sister but on the other hand Molly was not so sure about her mother.

Before she died, her mother was calling for someone with her arms stretched out. Molly thought her mother was calling for her so she leaned in, hoping to hear what she was saying. All she heard was "Irene. My baby. Irene..." Those were her mother's last words.

Author's notes: I'm back! Sorry it took me so long, I was writing another story and I want to give each of my stories my undivided attention. Sorry for the late wait but don't worry, from now on I will update more often so do stay around :D

I hope my Sherlock and Molly aren't too OOC. I have a bit of hard time crafting out the characters for this story and I don't know why. Also, I hope my story especially about Molly's past makes sense to you. Enjoy!

**To Modoko, thank you for your very kind review! Hope I will not disappoint you :D