A/N: Since this is the first time I've wrote for the Detective Conan fandom, go easy on me. This is what happens when I watch Detective Conan and Dancing With The Stars side by side. Anyways, this little project of mine's something I'd write when I'm bored, so don't expect updates to be quick from me. Never the less, this is my take on an AU setting regarding APTX 4869. If you, however, like this story, please don't shy away from leaving a review! :)

Disclaimer: You guys know the drill.

The Beginning

"Shinichi, do you know anyone by the name of Trese?"

Professor Agasa was holding a mysterious, black letter in his hands as he entered the living room. The strawberry-blonde was busy typing away information in her computer while the young boy read The Adventures of Sherlock Holmes for the nth time. As soon as he heard the professor's voice, he looked up from what he was reading and grabbed the envelope from him.

Shinichi quickly skimmed through the contents of the letter, noting its gold furnishings across the border. Haibara, in turn, swiveled her chair towards the boy and observed by his side.

"Peculiar. It only says she'll come by later this afternoon."

"No time specified?"

The boy shook his head. "None. It only says that by the time we've read the letter, she'd be waiting by the door."

By sheer coincidence, the doorbell rang in his front door.

"Huh? Could it be the sender?" The professor muttered as he approached the door to welcome the guest.

"Hellooooo! I'm the sender of that black letter over there!"

"Oh!" Agasa chuckled, "We didn't expect you to come by so… early. Please come in."

The pair was definitely expecting another blonde to enter their abode. Especially not one so energetic and bouncy.

"You need refreshments dear?"

The blonde shook her head in response, "I'm completely fine! I just need to talk with these two." She promptly turned her head to the direction of the two children.

"Edogawa-kun, do you feel it?" Haibara whispered to her partner. She wasn't getting any pressure from the visitor, but she wasn't about to let her guard down just yet.

Conan nodded in response, "She's hiding her identity to us."

At Conan's statement, the blonde burst out in laughter. "I guess I shouldn't be fooling around with you, huh?" She gave them a small smile before removing her sunglasses and tying her hair up in a ponytail. "Nothing can fool you two, huh?" She opened her lids, revealing sharp blue-gray eyes that seemed to shift at her gaze. "I'm in front of a famous detective and a science prodigy, after all."

"Who are you and what do you want?" Conan asked, dropping his child act and facing her gaze.

"What do I want? Simple. I want you two to partake in a little experiment of mine."

Haibara raised her eyebrows. "And what experiment is that?"

"What else is there to experiment you two for," she smiled," but for the antidote of the drug that made you that way."

Shock was clearly written all over the faces among the people, especially Ai's.

"I know a lot more than you think you do. And, if there's anything I've discovered, is that the antidote in your hands lasts for a mere 24 hours before it wears out." She crossed her legs, somehow beckoning the children to listen to her cause. "We've discovered an unknown enzyme that could be used to somehow slow down the effects of the APTX. You may not completely revert back to your original form, but it could serve as a lengthening of some sort. In short, I can expand that 24 hours to, at most, two weeks without risking the extra production of antibodies."

"And the catch?" Haibara asked challengingly.

"Quite a few. Since the main laboratories are located in America, we'll have to go fly there in order to gather as much data as possible. Second, you guys have to be under my care. My powers with the police may be large, but it's still limited for your protection.

And, lastly, you have to be my students."

"Students? In what?" The boy was now holding a skeptical look on his face.

"In ballroom dancing, of course!"