This story idea I got when I thought about how much Kaito looks up to his Father, so what would happen if someone were to threaten an artefact in a museum with a copy of Kaito's Father's portrait in it and Kaito figures the threat letter out. Conan and Heiji join the investigation and have to help the thief with some personal issues and also stop the person who sent the threat. Just a little something I wanted to do while thinking up more of 'Black Clover'. I don't know much about Heiji Hattori, so sorry if he's out of character in this. I haven't seen much of him in what I've watched of Detective Conan and writing his accent is ... hard. However from what I HAVE seen of him I DO like his character and interaction with Conan and having him interact with Kaito would be great too.

Anyway, I hope you enjoy this short fic, because I'm planning it only being five or something chapters long.

Chapter 1: Representation

It was dusk in the Ekoda district of Tokyo; two teens, a child and an adult entered the museum with passes. A huge crowd was forming inside; like at a Kaitou KID heist only this wasn't one.

It was different.

Inspector Nakamori had received an advance notice without the KID doodle at the bottom and the taunt of what he was going to steal.

This time it just said: 'The portrait of the one I despise will burn tonight.'

No designated time.

No hint as to who sent it.

Just the one phrase.

Nakamori had realised then that it was a threat letter. Not from KID. He never sent threats; only taunts and riddles.

Never threats.

So this led to Nakamori getting his Kaitou KID Task Force together and helping arrange safety procedures with the owner of the museum along with the security. They had no idea who the culprit of threat letter was. Only that they had to be careful. Since they didn't know the object of their threat they had to look after every artefact in the museum.

This led to Nakamori having to begrudgingly ask for Kogoro Mouri's help as he had the KID Killer with him most of the time; Heiji Hattori had been visiting at the time the call came which led to him joining in. The four then took a train to Ekoda and had arrived at midday.

They were now wondering around the museum; looking at all the different artefacts in wonder; Kogoro bored and glancing around for the Inspector in irritation, Ran interested in almost everything she saw while Heiji and Conan stood side by side behind the two.

"'ey Ran-chan, do ya min' if ah take t'e kid tah look aroun'?" Heiji asked Ran, looking over at the brunette girl as she turned towards him.

"Sure, you can, Hattori-kun. Just be sure to keep an eye on him," she told him, smiling, turning back to the glass case full of different types of jewels and even weapons.

"Sure…" he muttered, looking down at Conan with a smirk. The boy rolled his eyes at the comment as the two headed into the exhibition hall and away from Ran and Kogoro.

Conan looked up at his friend with a frown crossing his child-like features. "So, what is it Hattori? You wanted us to get away from Ran on purpose to talk to me." The boy stopped in front of his detective friend, so they could talk quietly, hidden amongst the talkative crowd. "So, what is it?"

The teen scratched the side of his head under his baseball cap and sighed. "This is just bot'ering me is all. Who sends a t'reat le'ter … saying t'ey're going to burn somet'ing…"

Conan looked down in thought. It did seem strange to him as well; putting a hand to his chin. Why would they do that? The letter also stated about someone they despised. Did that mean it was a painting? It all seemed as if this wasn't some random threat ... that someone was in fact going to do something bad tonight.

Maybe worse than what the threat letter spoke of...

"Kaito! Look! There it is! It's just like the one at your house!" The two turned their attention to see two teens; a girl with messy reddish-brown hair and a boy with messy brown hair standing beside her. They were looking at a portrait of a magician in a black dress shirt and pants with doves surrounding him in front of a red curtain.

The boy laughed at her comment; turning to look at her. "Of course! This is a replica after all. Mum made sure we kept the original!"

The girl bumped his shoulder on purpose with her own. "Or you begged her to considering how much you looked up to him."

"Well duh! Idiot! Of course I would!" he exclaimed, pouting at her though a smirk showed through.

This caused her to laugh. "Yea, I know." She looked at her watch and blinked. "Oh! I have to go find my Dad! I'll be back later, Kaito!"

The boy watched her go, turning around and letting the two detectives get a good look at his face as he waved her off; causing them to freeze. 'He looks like … me!' Conan thought with wide eyes.

The boy sighed, scratching his head and turned back to the painting. "I can't believe someone wants to burn…" The two detectives blinked at hearing this as the boy cut himself off. He shook his head and scratched his neck. "Geez, I never get emotional like this. I guess figuring that note out is making me this way…"

Heiji and Conan's eyes widened in shock; staring at the teen in front of the portrait. This guy knew what artefact was being targeted yet hadn't told the police.

Why?

They looked at each other and nodded. They had to confront him to find out.

The two approached the teen and once they were behind him; Conan did what he always does when confronting someone; put on his child act. He tugged the teen's pant-leg which caused a brief look of surprise to cross his face before he frowned. "Um … shouldn't you be with your parents, kid?"

The boy pointed at him as if ignoring his question. "How come you said you knew the answer to the note?"

The teen seemed shocked at that and laughed. "You heard that? Well, it's nothing. Just a theory I have."

"Really?" Heiji asked from behind him which caused him to turn around in shock, not realising he was there. "I would cer'ainly like tah hear it."

'Great. Just my luck. Two detectives in one place.' The teen swallowed and smiled, trying to seem like it was a joke. "It's nothing; just a stupid theory."

The two detectives looked at each other; raising brows, suspiciously at the teen. They looked back at him; to see he was looking back at the portrait with fond blue eyes. The boy looked up at the teen; he recognised that look.

It was admiration.

"Did you know him?" Conan asked, innocently.

"You … could say that…" the teen replied, turning back to the two with a smile on his face. Before he could say anymore; a vibration in his pocket cut him off. He took out his cell phone and blinked at the number. "Excuse me…"

He walked away from the two; who looked at each other with frowns. 'He's definetly hiding something...'

Kaito had wondered around the corner of the exhibition hall and into a clear hallway. He took his phone out and put it to his ear.

"Jii-chan, what's up?" he questioned the old man on the other line.

"Master Kaito, sorry to disturb you," Was the reply from the other end; an old and crispy voice.

Kaito shook his head as he leaned against the wall in the darkened corridor; free hand in his pocket. "Nah. It's cool. So, do you have any news for me?"

"Yes … and I'm afraid it's not good…"

"Not good?" Kaito questioned, frowning as he looked back into the hall where all the guests were along with the two detectives.

"I checked the security feed like you said to see how this person will destroy the portrait…" Kaito looked at his phone; hearing the wobble and stutter from the old man. "…I haven't seen anyone suspicious yet, but I did notice something in the lower levels…"

"What was it?" Kaito asked, trying to stay calm.

"A bomb…"

Kaito's eyes widened at hearing this. He couldn't believe this. His eyes went to the floor with a frown creasing his features. "So … that's what their planning…"

"Master Kaito … I'll give you the coordinates as soon as I can and tell you the bomb's timer as well."

Kaito gritted his teeth and nodded at his apprentice and friend. "Thank you, Jii-chan. Also…" The teen thief bit his bottom lip, wondering how he could ask this. He sighed to himself. If there was a bomb in the building he; Kaitou KID, would most likely need help even if it was in fact detectives he needed help from. "…the detective from Osaka and the KID Killer are here. What should I do?"

There was silence on the other end before the old man finally decided to reply. "It may not suit you to tell them, but to avoid a panic and get this done with more than one person … you may need them."

Kaito let out a deep sigh and nodded. "Alright. Thanks for the advice. Text me when you get the coordinates." Kaito hung up and looked back out into exhibition hall before walking back in; acting as if he didn't just get a call telling him a bomb was in the building. He approached the two detectives once more with a smile on his face, rubbing behind his head. "Sorry about that. It was my Mum."

The two boys rolled their eyes and laughed, nervously as if understanding. Kaito's grin fell from his face as his eyes went to the two and they stared at him, realising he was scanning them. The calm look on the boy's face almost reminded them of a certain thief. The only thing he needed was the suit and the witty smirk.

"I need to talk to you two," he spoke in a calm voice that un-nerved the two yet also made them suspicious. Kaito led the two into the hallway he had previously been in and leaned against the wall, sighing.

"Wha' is it?" Heiji asked the teen with a single brow raised.

"Is it about the note?" Conan asked, getting straight to the point and Heiji stared at him; almost forgetting the reason about why they had confronted the teen in the first place.

Kaito nodded at them. "Yes. However there's another reason now." The two blinked and stared at him with a frown. "The call I got … wasn't from my Mum. It was from a friend. He said…" Kaito lowered his head as if contemplating whether to tell them or not. "…that there's a bomb in the building."

The two stared at Kaito before Heiji growled and grabbed him by his jacket and glared at him. "An' how t'e hell do ya know this?!"

Conan ran up to Heiji with wide eyes and pushed on his leg. "Oi, Hattori! Stop!" The Osakan detective glared at the calm expression on the other teen before putting him down and scoffing.

He really wanted to give him a good punch from seeing the calm look on his face after hearing him say that.

How can he even be so calm after saying such a thing?

It didn't make any sense yet this guy was the proof.

Conan looked to his friend before turning to their supposed informant. "You wouldn't be doing this if you hadn't been here either and had your own mission, right … Kaitou KID?"

Kaito didn't even seem to flinch at the name, but just smirked. "I didn't think you'd figure it out so soon, Detective-kun."

Heiji stood there in shock and pointed at Kaito with wide eyes. "Wai', you're t'e…"

"I didn't want to reveal myself, but I had no choice considering…" Kaito folded his arms and looked down. "…this isn't a Kaitou KID Heist. I was just here as me with a friend. I heard about the notice from the Inspector and I was hoping to stop it. When I got the call … it shocked me…"

"Ya know t'e Inspector…?" Heiji asked, a sweat-drop by his head knowing the Kaitou KID's civilian persona knew the Inspector personally.

Kaito shrugged his shoulders. "I know his daughter, so of course I would know him."

Conan sighed, shaking his head and looked at Kaito with a frown. "Anyway … what's being targeted and why is there a bomb here?"

A small smile came across Kaito's face. The same one he had while standing in front of the portrait. "I thought it would be obvious." The two blinked and looked at each before looking back at him. "It was the one I was standing in front of…"