She saw him, of course she did, everyone did, there was no way he would get lost in a crowd with his crazy red hair and all black clothing. Chase, Molly Hooper's son, was leaning on the statue that was in front of her college. It didn't surprise her, after sixteen years of knowing him she thought noting did. She was wrong. He was playing with a necklace... the necklace!

Rosie took it from him as soon as she saw it.

"How.. What?"

The girl was shocked.

" I've seen the clues, it seemed like something to kill my time with."

" Kill your time? It was a complex puzzle, to answer all the riddles you had to have an IQ over 140..."

Chase just raised his shoulders.

" It wasn't even finished!"

" And how was I supposed to know that?"

The boy was starting to get annoyed.

" And how did you even know it was me? Did you solve it alone?"

"Bloody hell Rosie, it's not about being a genius, it's about observing stuff. People are just too narcissistic these days, they could see the smolest spot on their shirt, but not someone dying right in front of them. Did you really thought I would not recognize your initials?"

The girl didn't have a comeback.. She never thought that Chase was smart, but she obviously needed to reconsider it.

~*o0o*~

When she arrived at the crime John and Greg were talking about the fact that it was obviously a suicide and they were waiting their time, but Sherlock had that glimmer in his eyes that Rosie recognized in one second. It was the glimmer that he had every time a case was interesting enough to capture his attention.

" Oh good Rosie, you came." said the father still looking at the lifeless body. " Now, tell me dear, what do you observe?"

" Well she is obviously a very careful with the way she looks..."

" Yes, but...?"

Rosie looked at her for every angle she could tink of and in the exact second she was going to give up she saw it:

" The nail!"

Sherlock smiled one of this rare, large, proud smiles.

"Oh well you know what they say: like father like daughter."

John and Greg were just confused.

"Ahm..."

" Oh yeah, I've forgotten about them. Would you like to explain them Rosie?"

" I'll be honored! You see, this woman takes care of her looks, her hair is done, impeccable clothes, her manicure is done, but her nail is broken!"

" And that proves what? She probably just fell" said Greg feeling superior.

Rosie and her father looked at him with disappointment.

"May I?"

" Yes, you deserve it dear."

" Greg, your problem is that you see but you don't observe!"

John tried to hide his laugh with a fake cough and Sherlock smiled proudly.

" If you look closely you will see the paint that is under her other nails. The best part is that the paint under her nails is exacly the paint that covers this walls."

In the second that she finished her sentence, both she and her father started inspecting the walls.

"This must be it" said the girl full of adrenaline while taking down the wall the only painting that was in the room. Behind it there was a small door.

"She probably broke her nail while she hurried to open it." murmured John.

Behind the little door there was nothing but a paper. At first the four of them were disappointed, but then they saw what was on the paper: a map.

" Oh this is no suicide! No, no, no!" Sherlock's eyes sparkled. "This is murder!"

" Aaaa... I do not think it's ok to smile while saying that..." tried John.

" And it's not just murder, it's one of my favorite tipes of murder:"

" Murder for keeping a secret" completed his daughter

" Exactly, wathever is there, he said by pointing the "x" on the map, deserves the sacrifice of blood"

" Sometimes you scare me more than usual" said Greg shaking his head.

~*o0o*~

When she woke up the next day her fathers were playing culedo together.

" Remind me again: why aren't you two together?"

John seemed shocked:

" That is a question you don't have the right to ask!"

But Sherlock said nothing so Rosie smiled, her fathers had a complicated relationship and she wasn't going to make the mistake of asking too many questions.

~*oOo*~

Right after the classes she obligated herself to go to, Rosie went home, it wasn't a good day, it was the kind of day that she would prefer to stay thirsty than to talk with the person that sold the bottle of water.

She was surprised to see that her fathers weren't there, but she thought that they were working on the case, that was until she saw the note:

You're a little smarty pants, aren't you? Helping you daddies solve cases like that? But dear, you should know that some cases aren't meant to be solved. Now concentrate a little, would you? I want the map, I know it's somewhere in your house and sadly my boys couldn't find it, but you know where it is. I will make a summary:

1. If you don't bring me the map: your daddies go BOOM

2. You ask Mycroft or that little cop to help you: your daddies go BOOM

3. You don't come at four o'clock with what I've asked for in front of Big Ban: well.. I think you've got the idea.

~M

Frightened, wordlessly, she called Chase.