Hello everybody. I just need to do this :) I simply can not wait to September for season 4 premiere, so I need to write this. Sorry, I hope you forgive me :)
It's my version o season 4 premiere episode so don't kill me...

It all came to me after I saw a scene when Capt. Montgomery was sending files from his safe to someone. Just before he died he "mentioned" it to Lockwood that he "saw to that" that no one will harm Beckett.

SPOILERS: Of course season 3 finale... and more! :) (in my wild imagination)
DISCLAMER: I do not own Castle or anything what is associated wit this absolutely amazing TV show. Pleas don't sue... :)
LANGUAGE: English is not my primary language so I am very - very - very sorry for any grammar mistakes which I made writing this story. I hope you forgive me and you will enjoy this fanfic anyway.

Chapter One:
"Long time no see old friend"

Adam Lambert moved chip card over the sensor which was blocking the entrance to his office. He stifled a yawn, and tried to stop smile on his lips, when red light changed to green allowing him to enter.
"Open sesame" - he muttered quietly to himself and shook his head with a mild embarrassment.
Maybe it was stupid, but he really liked the all 21st century electronics surrounding him everywhere. Wherever it was a coffee maker, or business computer, or silly sensor guarding the door of his office (his castle). He simply liked to work when everything around him was in the right rhythm. And electronic gadgets was always all about rhythm.
He shook his head realizing pure foolishness in his thinking and then opened the door and walked into his office. His laptop left in stand - by mode quickly returned to life and automatic email box - began to inform him of the incoming messages.
He sighed, staring at the number of emails which he needed to face in the beginning of a day and quickly calculated in his mind how much time it would take. It won't be an easy task, but his job required the same amount of paperwork that a particular action. Long time ago he already resigned himself to that fact.
He pressed a button on the desk phone. A second later, on the other side he heard familiar voice.
"What do you need dear Capo di tutti capi?"
He laughed softly and shook his head.
"Annie! You are the Light of my miserable life... would you be so kind and made me a cup of coffee?"
Easy, easy boss... I'm in the bar already" her voice was colored with light irony. "I'll be in a minute!"
Moment later the door to the office once opened again, and his assistant appeared. In one hand she was holding a cup of steaming beverage, and in the other pile of papers. Adam threw her amused look his eyes move slowly on her - already well rounded figure.
Hey, Dumbo!" he greeted her cheerfully.
A woman had sent him a murderous look, but it was clear that she knew he was joking.
"If don't you want me to spit MORE into your coffee than I already do, you will never call me a Dumbo... ever again" - her voice was as sweet as chocolate with horse - radish.
With smooth movement she put his coffee on the desk and looked at him with question and amused defiance.
"More than usual, eh?" he winked at her, then raised his hands in a gesture of surrender. "Okay, okay. I give you my word that it was for the last time."
"Sure" she snorted. "I'll believe it when I see it"
"You had it coming for this Capo di tutti capi stuff" he shook his finger at her. "Agency don't like when their employes talk to each other pretending that they are Cosa Nostra."
"Yeah, yeah I'm not afraid."
He lightly tapped his finger on the desk phone.
"Psssss they are recording everything!" - he laughed. "You won't even notice when internal affairs will become interested in us and our activities."
She shrugged her shoulders ignoring the problem and put hand on her round belly.
"How are the twins?" - Lambert asked with concern. "They give you hell today?"
"Not really, but you know how it is - the fifth month has its own rules."
He chuckled.
"To be honest I don't really "know" - "how" it this. I was never pregnant." - he winked. "But you know with today's advanced technology it may be only a matter of time."
She shook her head in terror.
"Stop it! Or I'm going to have nightmares at night! You're just like my husband!" she accused him.
Adam eyebrows slightly drove upwards.
"Divine? Handsome? Eloquent? Wonderful? Unique...?
Annoying!" she clarified. You love to talk foolishness just to mess with my already fragile psyche."
He laughed.
Okay, I'm sorry. Truce?" - he asked hopefully.
"It never was a war in the first place" - she replied. "But okay. If you promise me not to mess with me whole day - I promise never to speak Truth about you."
Lambert combined two fingers in a gesture of oath.
"Scout's honor"
She confronted him with her eyes.
"I read your file, boss. You never were a scout."
"Oops."
"Exactly ... but okay, let it be. I know that you always keep your word."
He theatrically saluted her and took a sip of coffee.
"Perfect as always" - he muttered at the drink.
"Of course it is!"
There was a silence for a few seconds, then Lambert nodded in the direction of her hands.
"Lots of mail?"
"As always" she put the pile on his desktop. "Additionally, you have a bigger package from New York."
"From the Big Apple? Well, this is interesting! he began to search through the papers. "From whom?"
"From Captain Montgomery of the 12th precinct."
His hands stop for a moment.
"Are you kidding?" he stared at her. "From Roy?"
She nodded.
"Yes. From captain Roy Montgomery. You know him?"
Yes, indeed" - he smiled broadly taking large gray envelope form the pile. "He's one of the best cops in NY. My mentor... He taught me everything I know ... bah! Everything, and even more."
"Really?"
"But of course! Damn! I haven't talk to him for over two years. I wonder what's this about? He could call me. Interesting, very interesting."
Hearing a voice full of curiosity, his boss Anna smiled slightly and left the room closing the door behind her. She knew perfectly well that when Adam was really fascinated by something, there was no power to force him to abandon the topic.
Lambert slit the envelope and pulled out its contents onto his desk.
Surprised he looked closely at four personal files which emerged. Three of them had identification numbers which, as Adam knew from the autopsy was simply document about city employees. The forth however had only a single name - without any other writing.
Lambert frowned, when he quickly recognized that name, but soon his attention focused on a single sheet of paper, which was also attached to these documents.
He spread it with puzzlement and quickly read through the first few sentences.

...

It was a letter from Roy Montgomery addressed directly to him.

...

Suddenly he felt something cold touching every single cell in his body and in a split of second all his good humor simply evaporated.
For the first time in a long time... he felt fear.
Fear stoke him suddenly and clenched his throat with terror.
His face turned into a stony mask but some way he noticed that his whole body starts to tremble.
He yanked cell phone out of his pocket, found right number and pressed the call button. After waiting a few seconds, he heard a voice automated attendant "The caller is out of range. Please leave "
Lambert paled and nervously repeated the operation couple of times.
"Roy, pick up, please" - he whispered softly.
Unfortunately, each call ended with the same.
"The subscriber is currently unreachable."
Man cursed loudly and threw a his cell on the desk.
In a dream he reach out and press the intercom button.
"Yes, boss?" he heard Anna's voice.
"Find me immediately phone number to 12th precinct in New York and put me through to Captain Montgomery."
"Okay. Anything else?"
"Immediately Anna! he almost snapped, but he lowered the tone in the last moment but tension in his voice was evident.
"Give me a few seconds" - she said, then hung up.
Lambert closed his eyes for a moment trying to collect his thoughts and then breathed deeply several times. The he looked once again at piece of paper which he hold in his hand.
His eyes quickly scanned document absorbing every single word.
On his face - as in a kaleidoscope passed whole range of feelings. From the disbelief, shock and anger - to sorrow and compassion.
He didn't know how much time has passed - a few seconds, few minutes so he jumped in his chair when he felt a gentle touch on his arm.
He raised his eyes and looked at Anna. Engrossed by letter he didn't even notice when she enter.
Now, looking at her face he knew what she would say before she opened her mouth.
"Please say it" he asked quietly.
"I called the 12 th. Captain Roy Montgomery was killed during in shootout 4 days ago" - she said quietly.
Lambert closed his eyes.
He felt as if someone hit him right in the solar plexus.
For a few long seconds he could not even remember how to breathe. He tried to compose himself and after a struggle he managed that. "There will another time for mourning" - he told himself. "What I need to do now is to act!"
He forced himself to concentrate on the voice of his assistant.
"Funeral was yesterday..." - she continue. She hesitated for a moment as if not knowing whether to talk further.
Adam urged her with his eyes guessing that something went horribly wrong.
"Something happened at the funeral, am I right?"
She nodded.
"There was an incident."
"What kind of incident"
"Sniper attack."
She said it slowly as if she alone could not believe what she just said.
"Bullet hit a detective from the 12th when she was spoke in the memory of Capt. Montgomery. Bullet hit her in the chest."
He frowned, thinking hard.
"Is she alive?" - he asked shortly.
"Yes" - she confirmed, "But she is in critical condition in hospital. She got shot in the right lung. Duty officer from the precinct was not able to give me the details, but from what he said I figured that she is still fighting for her life."
"What's her name?"
"Beckett. Detective Kate Beckett."
Lambert squeezed tightly latter from Roy which he held in his hand until his fingers turned white.
Slowly he moved his eyes over the text, pausing several times after spotting name that Anna just mentioned.
He put the paper on the desk and hide his face in his hands. He tried to breathe deeply several times and after a few seconds he calmed down enough that he could begin to think clearly once again. In his mind it gradually began to crystallize delicate outline of a plan.
He looked at his watch, and then at his assistant. She was clearly upset and she was looking him without a word.
"It's 8 a.m." - he said slowly. "Please call the director's assistant and set me a meeting with him at twelve, okay?"
She nodded and he continued.
"I have a few hours to review this... papers... before I get to the boss..." - he sighed. "|I also plan a few things."
"I understand. Do you need my help in anything?" - she asked.
He shook his head.
"No, thanks Annie. It's all for now... I just need to prepare for this meeting. Please let me know as soon as you get confirmation."
"Of course."
She turned towards the exit, but after taking a few steps she stopped for a moment and looked back at him.
"Adam ... I'm very sorry about your friend."
"With titanic effort he managed to send her a weak smile.
"Thank you, Annie. He was a really special man. I'll miss him greatly."
She nodded and quietly closed the door behind her.
Lambert looked for a few seconds at the documents laying on his desk. His eyes slowly began to resemble the cold steel.
"Don't worry Roy" - he said quietly, as if trying to calm ghost of his mentor. "I'm gonna do what you ask me to do."
He clenched his fists.
"I swear to you on our friendship" - he whispered.
He opened the first pack of papers started to read. Now he had to plan his every move, but for him it was nothing unusual. Only the first phase will be requiring rushing things down after that everything will calm down.
It will take time... but time will help him to organize everything...
And when all the pieces of this puzzle will be together in right place...
Than all the guilty people will regret that they were born...

To quote Wyatt Earp...
"You tell 'em I'm coming!"
"And Hell's coming with me you hear!"
"Hell's coming with me!"

I promise Roy!
Scout's honor!

this is the end of part one...

would you like me to continue? :)