Once in a Blue Moon [[Kaishin]]

Prologue

A small group of the police ran around, a letter triggering the panic. Two detectives currently held a copy of the letter in their hands, their eyes analyzing every detail. 

In every blue moon, in every starry night

My desires are unleashed, so becomes the light

Bringing forth a new era, the doves shall fly

And again with the harmony, the moon will rise

Come forth thee who shall see the ever-lasting life

Keys are shrouded, along with it a fight.

-ADAB

Their mouths formed into a smirk, finally knowing the letter's message. "How simple of him." Hakuba said, gaining the police's attention. Nakamori Ginzou, former head of the KID Task force, questioned on what the letter meant. He was never good with riddles but was he a damn good police officer. Shinichi had never met someone like him. Sure, their first meeting was sort of a... failure, but over time the inspector and the detective got along thanks to Aoko Nakamori, the daughter of Nakamori, and his childhood friend Ran. 'If Ran hadn't kept on dragging me to Nakamori-san's place, we'd be clashing our heads right about now...'

It had been two years since KID's last heist. Two years without a single heist notice on the police's doorsteps. KID was officially retired, apparently. His last heist was a bit of a shocker to be honest. Multiple snipers were present, targeting KID whilst he quickly stole the gem. Shinichi was positive that was the gem he was looking for and now that it's done, KID was no longer needed and with KID gone, the KID Task force was no longer needed as well.

"Do you really want to know?" Shinichi asked, his eyes with an all-knowing glint. The small group of police officers nodded, ready to act. "The letter really doesn't have anything important to it but--" He was cut off by Hakuba's hand being placed on his shoulder "Just a moment, Kudou-kun."

"Do you really want to tell such a small group important information? Shouldn't you at least gather about... a thousand police officers?" The officers flinched 'A thousand officers?!' Their minds screamed. "Why would we need that many officers, Hakuba-kun?" Nakamori-keibu asked what the untold question was. Hakuba smirked, his eyes closing before opening again "Nakamori-keibu, are you ready to fight?"

"W-What?" The inspector didn't expect that one coming. "Oi, Hakuba. Don't scare him like that. We both know that he can fully take him on again like two years ago." This brought up cautious alarm to Nakamori-keibu. "What about two years ago?" 

"Look here. See the first letters in each line? What does it spell?" Shinichi held up the copy of the letter "I,M,B,A,C,K..? I'm back..?" The inspector said out-loud. "But Kudou-kun... No one has ever heard of ADAB! How can he say he's back when no one even knows of him?"

"Maybe... But if we turn every letter in that name into numbers... Well, you'll know exactly what we mean by this letter being 'too simple' of a cipher considering who wrote it." He finished as the Inspector began to think. "ADAB... 1..4..1.." He paused before his expression showed a mix of horror and glee "..2" He finished before repeating it again "1412, other words known as..."

"KID." Hakuba finished. "But... But why?! Why would he come back?! Does that mean his announcement at that time was... a lie?"

"I doubt that." Shinichi whispered, but loud enough for everyone to hear "I doubt that his announcement was a lie. Remember, that night was the first and last time he stole a gem after his eight year hiatus. That would mean that the gem he stole was the one he was looking for. This note was probably written unexpectedly, meaning..."

"He's looking for another gem again." Hakuba finished Shinichi's explanation "Which is why Nakamori-keibu, we need a thousand officers. We need the KID Task force." 

The next day, KID was in every news channel.