"It can't be him!"

" I'm sure that there are many serial killers with names that start with M in this city"

" How can you be sarcastic in those moments, Rosie?!"

The girl tried to grin but she was far too stressed. Millions of questions filled her mind and she felt like she was going to explode.

Where are my parents?

Is "M" coming from Moriarty?

Should she give "M" the map?

The worst part is that she had all these questions but not a single answer.

" Rosie, you can't give him the map!"

" But... but my dads!"

" Your dads, at least Sherlock, would not want you to do that. It obviously shows the position of something very important."

" I can't just let them die Chase!" there was mic between fear and anger in her voice.

"You can't and you won't, that's why we need a plan."

~*oOo*~

" I guess the weather decided to be very descriptive of our moods today" the boy said while looking at the grey clouds that were hiding the colors of the sunset. There was just a drop of orange, but it seemed abandoned by the other colors.

Rosie didn't even listen to him:

" You still think it's not Moriarty? The guy told us to come on the roof of the building... It just seems to familiar."

" Oh it remembers you of the time your father jumped, doesn't it?"

The girl throwed him a sour look:

" You really don't know how to be subtil, do you?"

" Well I guess I could try, but where would be the fun in that?"

From the rooftop the landscape looked even sadder. The clouds coverd Big Ban and looked like they were going to subdue the entire London.

"Under the bridge downtown

Is where I drew some blood

Under the bridge downtown I could not get enough"

The song came from a girl's phone. She was banging her head on the rhythm of the music. She wasn't even looking at them when she started talking:

" God, I love this song, don't you? Red hot chili peppers are my jam!"

Chase and Rosie were completely wordless.

" You're.. a girl? And... you're our age?" murmured Rosie

" No shit Sherlock! Do you see what I've done there?" said the black haired girl bursting into laughter.

The two of them just stayed and stared.

" Anywaaaaay... My father wouldn't be so happy that I listen to them, he was more into that 70's, 80's kind of think.. And my mom? Well if it's not a violin she doesn't like it."

" Wait..."

" Oh, I can almost see your little brains processing the information, it's so cute."

" Are you the daughter of Moriarty and Eurus?"

" Yup, isn't this cool? We're like the new generation!" she said winking at them. " Oh and also the "M" on the letter, it's not just a prank to make you think that somehow my father is alive, that is stupid, I would be really disappointed if either of you thought that."

Rosie blushed, but luckily she didn't see it.

" My name is Medusa. Oh, don't make those faces, both of my parents were crazy, did you really think they were going to name me Betty?" she said with a little smile

" Oh c'mon! You're so boring!" she started being agitated, she was walking from a corner of the rooftop to the other."If you're not going to talk we could just jump into the " give me the map or I will kill you little daddies" part."

" The map is here, but first bring Sherlock and John." said Chase rising the envelope that he was holding.

" You're so adorable" she said in a sweet voice, but then she started screaming: "Don't try to trick me little boy! Unlike you, I'm not a beginner at what I'm doing. Her fathers are in a cabin of the Big Well. And the best part is that in every other cabin there is a significant, and by that I mean huge, amount of explosive. So I repeat: Do. Not. Try. To. Trick. Me."

With every word of the last sentence she said she shaked her head brusquely.

" Your friend told me that you were going to try. Apparently she cares more about those men than any map or well.. than she cares abou you."

Chase looked at Rosie in a way that broke her heart. He felt betrayed.

" So give me the real map or the detective and the doctor will go up in flames, and:why not? I will shoot you too." Medusa said that while taking out that gun she had in her jacket and pointing it at Rosie's head.

" Tick Tock, Tick Tock" her little song was filling the cold air with repulsion.