Disclaimer: Transformers belongs to those who own it, I am making no money off of this. The term Spark Synchronize and its variations are used with Thalanee's permission.

Notes: Thank you to maiko_ragi for all the awesome ship name suggestions. I chose Xantium from her list as the Airships name. For this purpose I'm only using the name. The ships appearance in this story is much different. As is its occupation.


"You remember?"

Prowl felt adoration welling in his spark. "I remember."

Jazz snuggled close for a moment then was off and Prowl felt his presence brushing each of his systems. It took a few clicks to realize Jazz was checking for injuries. But before he could let him know he wasn't hurt, Jazz had brushed past Ratchet.

The attack was fast and furious, lashing out, and Ratchet gave thanks to his medical grade firewalls. Even so, several were torn down before Prowl could surround Jazz and coax him away with soothing words.

"Shh. It's alright. He is a friend. He's here to help us."

Jazz curled in against Prowl and sent out an apologetic wave towards Ratchet. "You're not injured? How are you able to be here then? How do you remember? You never have in the past."

Even though the questions were directed at Prowl, it was Ratchet that spoke up."Prowl isn't certain why he remembers this time. But that's part of the reason I am here. And also to find out how your able to contact him like this. I have a few questions I'd like to ask you."

Jazz gave a noise of affirmation, his attention focused almost completely on Prowl.

"Was there something different about Prowls leaving this last time then the others?"

"Yes, in the past when he had left it was always slow, I knew he was going ahead of time. This time he was scared and it was sudden. And I panicked because I thought someone was attacking him again. I knew I couldn't help him and it made my own reaction even worse." Jazz never turned from Prowl, but he had the impression the bot was giving the question all his attention.

"Hmm, In the past I've always allowed Prowl to come out of any medically induced recharge on his own. This time I brought him out of it. I suppose it could have done it rather suddenly. And if the emotions running through his spark at the time were that intense, it could have helped him to remember you."

"I'm just glad he did remember this time." Jazz wrapped himself around Prowl, touching every part of him that he could reach. Prowl's presence flushed with embarrassment and struggled to get free.

Ratchet chuckled. "Alright, I'd like to know when you first started being able to contact Prowl."

"I was a sparkling the first time it happened. It scared me at first, I didn't really understand what was happening. But he was so sad and scared that I couldn't help but reach out."

"A sparkling? How old are you Jazz?"

Jazz's murmured response was low and distracted as he began to stroke Prowls presence softly. Prowl gave a slightly embarrassed noise and shifted away from him.

Ratchet was amused at their antics. Jazz was only a little older then Prowl, but still acted like a sparkling at times. He was quickly beginning to like the mech though. "I don't remember Prowl being injured as a sparkling. But I did have to put him in a medical recharge a few orns after his creators died, so that his systems could rest."

Prowl tugged completely free of Jazz and retreated. The lively presence followed of course and they began a small game of tag. Ratchet watched for a few clicks as he tried to order his thoughts and figure out what else they needed to know. He let out another rumbling chuckle when Prowl managed to sneak up on Jazz and wrap him up tightly.

"Jazz." The mech instantly shifted his attention back to the medic."Prowl said that you couldn't tell us where you lived. What can you tell us?"

"I can't tell you where it is, but I can tell you it's name. The cities name is Kaelex"

Prowl stiffened. "The Lost City?"

"That's what most of Cybertron calls it. I started telling you stories of it that first time. It helped distract you."

Ratchet snorted. "Well that explains his obsession with the place. He must of remembered on some level."

"I thought it was Wheeljack and his stories that got me interested in Kaelex."

"Wheeljack? I used to know a bot named that. He played with all the sparklings. Come to think of it he left shortly before the first time time I connected with you."

"How is that possible? Unless it wasn't our Wheeljack." Prowl flickered slightly as Jazz began exploring more of his systems.

Ratchet could feel his own systems beginning to tire from the data interface connection with Prowl. "We can question Wheeljack in the morning. I am going to go get some recharge. The medical recharge will last another few hours, but you had better let Prowl rest his mind as well as his body."

Jazz gave the impression of innocence.

"Oh, don't give me that slag. Just let him get some rest."

Jazz laughed softly and turned back to Prowl as Ratchet faded from his systems. "What does all this mean Prowl? What does it matter how or why we can communicate like this? I'm just happy that we can."

Prowl made himself comfortable and purred with contentment when Jazz settled down beside him. "It means I'm going to do everything within my power to find you."

The two talked quietly for a long time, and they learned a lot about each other. Prowl learned that Jazz loved music and loved to dance even more, but that he also played an integral part in programing and upkeep of the system that kept Kaelex invisible from the rest of the world. And Jazz learned that Prowls interest in the Ancient History of their planet included much more then just the Lost City. Towards morning the shot Ratchet had used to put Prowl into deep recharge began to slowly wear off and the two spent their remaining time together simply curled tightly together, basking in each others presence.

\/\/\/\/\/\/

Prowl leaned back against the wall, crossing his arms across his chest and watched the scene unfolding before him with amusement. Ratchet leaned across a table, practically yelling at the demolitions expert. Neither he nor the medic were concerned about the sensitive work the bot was doing. Wheeljack was one of the best on the planet. At the moment he was working on a small device designed to demolish buildings quickly and quietly. He had been answering Ratchets questions with a distracted murmur ever since they had entered the lab.

"The Lost City is a myth, stories told to entertain sparklings. How many times have you not said this yourself?"

"That's slag and you know it! You know where the city is!"

"If I knew where the city was I'd be a lot richer then I am. Now wouldn't I?" Wheeljack twisted something on the box he held and a soft ticking sounded before clicking off. He turned to gather some wires and began to attach them.

Prowl shifted and opened his mouthplates to speak, only to stop at a motion from Ratchet. The medic was quiet, simply watching the other work. After a couple clicks, Prowl understood and leaned back against the wall.

Ratchet waited until the other was fully enveloped into his work once again before asking his next question. "Jack, Who is Jazz?"

Wheeljack's response was as distracted as before. "Bright little sparkling. Black and White with a blue visor. Always full of energy, and can find the best hiding places. If he doesn't want you to find him, you aren't gonna."

By the end of this, he finally realized was he was saying and jerked his gaze up to stare at Ratchet. Ratchet smirked.

"How the slag do you know about Jazz?" He didn't bother trying to say he meant a different Jazz. It wasn't that common of a name.

"Your nephews spark synchronizes with Jazz's when he enters a medically induced recharge. Its done so ever since he was a sparkling apparently. He wants to find Jazz."

Wheeljack looked stunned at first then it faded into sadness."Its not possible."

Prowl pushed away from the wall, moving to stand before his uncle. "I won't accept that. I have to find the city. I have to find Jazz. I may not have remembered him before, but my spark has always remembered. I just didn't understand before."

"Understand what?" Wheeljack stared at his nephew and set the device he had been working on down.

"That the whole reason I've been fascinated with Kaelex is because of Jazz. I have to find him. If you know anything that can help, please tell us." By the end Prowl was practically begging.

Wheeljack lowered his optics. "It's not so simple, Prowl."

"I don't care. Please, Jack."

Wheeljack sighed and sat heavily in the chair behind his worktable, motioning to the other chairs in front of it. He waited until they had seated themselves before beginning.

"I don't know where the city is."

"But you've been there?" Ratchet leaned back in his chair.

"Yes. About a vorn before my brother died I went to the Southern Hemisphere to do some research on a new trigger system I was working on. We were several mega-miles outside of Kaon when we were attacked by a giant creature. It killed most of the team and left me for dead. I couldn't move or anything, the cables in my legs had snapped. The last thing I remembered was the creature towering over me. When I came back online I was in a room with walls made of silver crystals."

He paused in his tale and a smile reached his optics. "One of the first things I was aware of was a small black and white sparkling staring at me. He reminded me a great deal of you, except no doorwings and he had a visor. He told me I was in Kaelex. I thought it was a joke at first. I still did until I was healed enough and they took me on a tour of the city. It was beautiful. More so then the stories say. I fell in love. With the city, its people and its customs. The longer I stayed, the more I didn't want to leave. And they accepted me fully."

Prowls spark twisted at the sadness in his uncles voice. "But you left?"

Wheeljack sighed. "I had to. I felt my brothers death in my spark. I knew that I had to come back for you. But there are conditions when you leave Kaelex. Any memories you may have of its location are wiped from your processor. They allow you to keep your memories of your time within the city, but you have to promise you will never seek them out again."

Wheeljack paused, his optics lowering. "I made that promise. I cant help you find them, Prowl. I'm sorry."

Prowl sank back into his chair, disappointment flooding his spark. If his uncle couldn't help him, the only other clue he had to find Kaelex was the artifact. His optics widened. The artifact! He had forgotten all about it. Hope flared and he gently pulled the box containing it out of his subspace and placed it on the table. He was aware of both Wheeljack and Ratchet leaning forward as he opened the box and gently removed the artifact.

"Where did you get that?" Wheeljacks optics were glued on the artifact.

"I acquired it just before the attack. Do you recognize it?"

"It's a gate key. They're quite common within the city. But I have no idea how one could have gotten here."

"What is a gate key?" Ratchet leaned forward to inspect the key closely.

Wheeljack took the key and turned it over in his hand, searching its surface for identifying marks. "Well, the city is built around and made up of a special crystal. Its shape can be changed to what ever a key holder would like it to be."

"What do you mean? Why would they want to change it?" Prowl's curiosity was getting the better of him, and he leaned forward eagerly.

"Say that you had a new sparkling and needed room for it. Their buildings are made of this crystal so its not possible to actually construct it. There is an energy force that runs through the crystals, and when a key is used, its possible to change the shape and size of a building. They can be used for other things as well, but that was the most common."

"That would be pretty handy." Ratchet glanced up as Prowl suddenly stood up. "Where are you going?"

Prowl waved a hand towards the artifact on the table. "While this is fascinating, It's not helping me find Kaelex."

Prowl left the room, and Ratchet turned an accusing optic to his friend. "I know you made a promise, Jack. And I know how seriously you take them, But for pits sake! Prowl is your nephew. Family! You have to help him."

Wheeljack looked down at the gate key before raising his optics to meet Ratchets determined ones. "You said Prowl's spark synchronizes with Jazz's when they reach a certain point in recharge?"

Slightly thrown by the sudden switch in topic, Ratchet merely nodded.

"If we got closer to the city, do you think the synchronization would deepen?"

Ratchet looked thoughtful. "I have no experience with sparks synchronizing, but its possible."

"Prowl would be able to follow his spark to the city."

\/\/\/\/\/\/

Prowl sighed as he entered the makeshift med-bay that Ratchet had set up in one of the outer rooms of Wheeljack's lab. It had been two weeks since Wheeljack had agreed to lead them to the area where his team had been attacked. Many things had been organized since then. And the whole expedition had grown bigger then he would have liked. But his uncle was adamant about having adequate security along with them. Hence the six mechs currently getting checked over by Ratchet.

Four of them appeared to be ex-enforcers. Their frames black and white like his own but with a more uniform pattern. The other two he wasn't that sure about. They were freelancers with a reputation of getting any job done. But Prowl wasn't sure he liked the implications in the reports he had read on the twins. The red one fiddled with a blaster while Ratchet checked over his golden brother. He could hear the mech complaining about Ratchet scuffing his paintjob, and chuckled when Ratchet threatened to do a lot more then scuff it if the mech didn't hold still. It didn't pass his attention however that Sideswipe and Sunstreaker both kept themselves at a distance from the other mechs.

Prowl turned his attention to the other members of the team. Ratchet and Wheeljack were both going of course. There was Blaster, an expert in ancient languages, which they didn't really need as Wheeljack could speak Kaelexian just fine. But once the mech had found out about the trip from Ratchet, He had begged to be allowed to go. Then there was the last member of their team.

His optics narrowed as he studied the small yellow mech that sat in the corner and kept to himself. Bumblebee had been chosen to come on the expedition because of his skills at negotiation. They seriously hoped they wouldn't need them, but with Wheeljack breaking the promise he had made, they had decided it was best to be prepared. The mech was quiet and seemed almost sad. Before he could go over and introduce himself however, his uncle showed up next to him.

"It's set. The Xantium lifts off midday tomorrow and I have secured our passage to Kaon."

Prowls shot his uncle an astonished look. "The Xantium? Why would you book passage on the most expensive transport out there?"

"Because it is also the fastest." Wheeljack placed his hand on his nephews elbow and gently steered the mech off to the side, furthest from the others. When he spoke, his voice was low, barely audible. "I know what its like for your spark to call out for its other half. And while you've been handling this admirably, I can see the strain your under. It's always been there, I just never knew why before now. And if it takes a few more credits to get you there faster, I have no problem with that."

"You know...? Did your spark synchronize with someone in Kaelex?" Prowls own spark was sinking in his chest, and he couldn't help but wonder just what his uncle had given up for him.

Sadness entered Wheeljack's optics. "No, Prowl. It didn't. But I do understand. Make sure the team knows we are leaving tomorrow."

Prowl watched his uncle leave, tempted to follow after and inquire more deeply. But decided that if Wheeljack had wanted him to know he would have elaborated. He just hoped he would have a chance to repay his uncle for everything he had done for him.

\/\/\/\/\/\/

It was Jazz's favorite time of the day. A spectacular sight was about to unfold before him and he wasn't about to miss it. Never slowing his pace, he ran directly at the wall, leaping he bounced off the wall and pushed himself higher. Landing with a thud against the crystal wall directly across the alley from the one he had leapt against, he twisted and pushed off again. He landed on the roof of the first building with a gentle thud and straightening from his crouch he turned towards the west once again. It was almost time. Making his way forward, uncaring if he disturbed those in the buildings under him, he kept his gaze trained on the edge of the city.

The holographic shield that surrounded the city and kept it invisible from the outside world flickered overhead. From the outside the shield reflected its surroundings, perfectly camouflaging the city. From the inside the shield was transparent, adding an electric sheen to the sky. It was nearing night, the sun dipping just below the horizon.

Jazz stretched out on the rooftop, his optics trained on the horizon. The moment he was waiting for came. The reddish orange light from the setting sun struck the crystal buildings and set the city aglow. The light reflected off the crystals that topped the buildings and struck the shimmering holographic grid. A rainbow of colors burst across the sky.

Jazz basked in the glow, hoping that somehow, someday he would get to sit here with Prowl.