A/N: Firstly, arrow verse is set in the same universe. Secondly, there will be different pairings along the way of this story. To avoid any confusion the pairing of Earth X will not be Overgirl and Dark Arrow. Finally, instead of Nazi's I would rather stick to evil versions of themselves controlling their world. I appreciate constructive criticism. Spelling errors and poor grammar will be updated as the story goes on. This is going to be a Supergirl/Flash pairing and the story is going to be set in the same universe, obviously apart from Earth X, to avoid confusion. Will try to update as frequent as possible.

Do not own DC or CW characters .

Flashback

"Without a prisoner - It goes unstable. And now it's bleeding energy onto our Earth."

"The Speed Force is unbalanced. I have to stabilise it."

"What? How?" - "By running into it."

"Barry, Central City needs The Flash. What happens if there is another threat, the Justice League needs a speedster... And a leader."

"Don't mess it up with Oliver. - I'll do my best. They're all gonna look to you now. I'm not a hero like you I don't give hope. You've always been my hero. Whether it be the Hood, Arrow or Green Arrow, I thought you were a hero from the very start."

"You're telling me that we should've been trying to save you instead of this... creature you have been fighting with your team for months?"

"You did save me, Joe. You took an 11-year-old boy with a broken heart, and you gave him a home and so much love. No son ever felt more love from a father. And Iris, you have given me hope in life and are the perfect definition of a sister. You have cared for me in my worst moments and have cherished my best moments with me. Eddie, take care of her." -"Anything for you Barry"

"It's been an honour to know all of you, to fight alongside of you. Now it's up to you to keep our home safe."

Barry starts to walk towards the portal until a firm grip of a woman clad in a blue suit with a red skirt and cape hinders him from taking another step. The hand clasped onto his arm sits with no desire to withdraw as tears fall from the beautiful superheroine.

"Barry... don't go please."

"Kara... you have been the most precious thing I have had on my time, but this is my penance. My redemption. And I want you to know that after I'm gone you will lead your life and this team to save everything and everyone you hold dear."

With no reply she had buried herself in his warm embrace for the last time as tears flow and run like streams of water and racking sobs causing her body to shake wildly.

"You have kept me steady on everything that I have done, and even though I have told you to realise you need to slow down, you were the one who has made me slow down and realise the importance of a slow pace." I had cupped her cheeks and focused her eyes on mine to finally whisper "You Kara Zor-El are so important to me, whether you dont think so or not. I have something for you in your apartment that I think you will love and I hope you remember me because I have grown to love you with all my heart despite the fact that you dont... or might not. But this is goodbye"

"Barry please..." She pleaded. Barry took her in for one more final embrace before turning towards his mother and taking her hand. One last look back at his friends and family and a small tear had fallen from his eyes. The speed force storm had finally dissipated, but Kara was left there. Standing alone, one of the most important person in her life just pulled away from her. It feels as if she is re-living Krypton's explosion, the trauma, pain and suffering. Staring into nothing but unable to calm herself down. A tug from Alex makes her instantly break into tears and collapse into her sisters arms.

"He's not coming back"

6 MONTHS FORWARD

Kara lay on her bed for the millionth time today gazing at the box left by her best friend six months ago. She had never wanted to open it, thinking it would be the last thing she would ever remind him of. She doesn't want to re-live the pain of losing him. It seems as though the team is as discouraged and depleted as her. Sometimes she would wonder if she could just lie in his arms again, memories of them laughing and watching a terrible show to just relax for a couple hours were golden to her. Memories that would just consume her mind wherever she was, especially when holding the box in her hand.

"Hey sis whats that?" Alex had interrupted her thoughts, making her forget that it was games night. Things were as normal as possible since Barry's disappearance. Everyone went to there respectable cities with a meeting or two every month. No big threat had appeared in the last six months in which she was thankful for because the team had not been communicating well at all, training sessions were poorly executed, people would just remember the hall as the place where Barry had left. But through thick and thin she still put on a happy face for the team's sake and for her sake.

"Um! Oh... it's nothing" Kara said lowly in a depressed tone. She had set the box on the table so she can prepare for a fun night. One to take her thoughts away and try to relax with her friends in National City. Occasionally she would invite Team Flash since Central and National were very close to each other, and with Cisco's more controlled breaching ability they could be in and out in an instant. Today though, she decided not to bother, they were probably busy. Especially with Wally's training taking up the Flash's mantle and the team were the heaviest affected having one man down, they were always stressed.

"Kara don't lie. I've seen you holding that box ever since the night he left"

After a prolonged silence and a deep sigh. Kara was about to tell Alex everything but the sharp ring of the doorbell had interrupted her.

"This isn't over. You are going to tell me everything once this night is over" Alex demanded.

After an hour or two of a plethora of board games, couple of episodes, pizza and pot stickers everyone had decided to say their goodbyes leaving Alex and Kara sitting on the coach.

"Ill see you tom-" Kara was hoping to forget about their conversation earlier in the evening but was instantly cut off by Alex's reply. "You will tell me everything now and what is inside that box"

Realising that there was no escape in this situation, Kara had decided to confess and tell her that Barry had left it in her apartment the night he left. Kara told her about the absolute desire of wanting him to step out of the portal and bring her to another one of his bear hugs, even with toned muscles and a lean frame, her body just seemed to fit perfectly in his arms and she hated the feeling of them separating. Sure they were only friends but Kara sometimes craved for more, but feared the feelings were never mutual and the last thing she wanted to do was ruin their relationship.

"So? What's in it?" Alex questioned

"I-I don't know. I haven't opened it."

"Kara you need to. What would Barry feel after all these months thinking you never got whatever he sent you, never got something that obviously wanted you to have."

"I-I can't open it." Kara said again with tears escaping her eyes, memories flooding in about the night he left. The soft whispers he gave her about being important to him sent chills down her spine and she felt so, so fragile despite being indestructible .

"Ill do it with you. Come on, knowing you, you will never open that box" Alex said in a calmer and more soothing voice.

Her voice turning into a higher pitch and nearly a squeal she manage to get an 'OK' out of her mouth.

A few items were taken out of the box. A small note and a USB drive along with a beautiful gold necklace made in the shape of a lightning bolt. Kara held onto the necklace with such delicacy and such care so that she wouldn't break it. Now tears were streaming down her face while Alex's touch was the only thing keeping her grounded to the ground as she started to read the note.

'Kara. This is for being my 'super friend'. I have loved and cherished every moment I have with you. You are such a special and unique person that I have grown to care about will all of my heart and with all of my life. I trust that you will lead our team because I know you Kara Zor-El. You are a shining beacon among the darkness, even with my disappearance you will give our team hope, love and morale. I want you to keep soaring and running. For me. The drive includes information for our friends and family, and a message that I hope you will read alone. Please don't break the necklace when you first get it, I know you have super strength and I should have probably invested in a stronger metal, but I hope you take this gift as a memory of me. Goodbye Kara.'

Keeping the straightest face she could manage she turned to Alex and spoke. "Can you please put this on." She handed her the necklace and turned around. Alex didn't even need to look at her to know she was on the verge of breaking down, and that her voice sounded so shattered and so broken after reading the note from Barry.

"I think this is enough for tonight. Do you want me to stay with you?"

Kara had just shook her head and proceeded to head to her bedroom.

"I would like to be alone for tonight if that is okay with you."

"Of course, goodnight Kara."

STAR Labs and the Hall of Justice

"Guys! Guys! I got it, Wally call the league now we need a meeting." Everyone had rushed into the cortex following up on Cisco's unusual behaviour and excitement.

"What is it Cisco?" Iris questioned, Team Flash had not been the exciting and fun team it once was with their Scarlet Speedster. Wally has been trying as hard as possible in protecting Central City but it had been really hard without Barry.

"I can bring him back."

"If Barry comes out, the Speed Force Prison goes It becomes unstable. It could destroy the city, the whole world. Which is exactly what we're trying to prevent."

"Please call the team, I've consulted with Harry and and Tina and Tracy and Felicity and Curtis, and I'm pretty sure I figured out a way to stabilise the Speed Force Prison and free Barry without unleashing another lightning storm on the city."

"This had better be important Cisco. We were fighting a serious time aberration and you are luck we got him before you sent an emergency alert."

The Legends, Team Arrow, Team Flash stood their waiting for the last team to enter. After a couple more minutes Team Supergirl had appeared with the surprise that Kara did not attend.

"We are sorry we are late. I don't think Kara's coming today, she had a very long night" Alex tried to reason.

"She would want to be here for this. We can bring Barry back."

All of the people who were standing, annoyed and wanting to leave as soon as possible stood in shock and surprise at the short, long-haired man. Before Alex could even reach her phone to contact Kara, she flew in such a high speed, that would impress the speedster if he was there.

"And how do you propose we do that?" She questioned with a raised brow.

For the first time in six months, the team were having hope, hope that their friend and family would come back.

"If my theory is correct, Barry will have to lead the Speed Force at one point. This is because if he doesn't than the wave rider would never exist. Barry created Gideon in the future meaning he has to come back and I see your ship is still working."

"Anyways, in the spirit of bringing back old friends, may I present the Speed Force bazooka. I have made a few slight modifications, as Captain Solo would say. Caitlin and I spent all of last night working out some kinks, fine-tuning the Quark Sphere.

"The what? - The Quark Sphere, filled with Barry's unique genetic marker, and programmed to track his specific DNA, using the electrical current of the Speed Force. Once we track Barry and we pull him out, the Quark Sphere will trick the Speed Force into thinking he's still there. Hey, Kara, can you put that on the centre pylon? A whoosh and a more ecstatic Kara stood alongside her team.

"Ready. Let's bring our boy home. Quark Matter scanning electrical current - Triangulating Quark Matter on his location. The screen had started to beep frantically.

"I've got a lock on something."-"It's him." - "It's him! Now, Cisco!"

Earth X

Chaos was all around Earth X. News spreading that their leader was gone. Dead. Many plots attempting to overtake the planet and start a revolution was forming. Overgirl was floating above the clouds distancing herself from hearing from the screams of people as she remembered him... everything about him. Barry Allen, the person whom gave her the world. The feeling of what love is like through the depths of misery and pain. Now he was gone, left forever and will never return.

It had been six months and she could care less about the world and what the people were doing. However, a voice had stopped her thought. Oliver. What did he want now? This angered her as she flew straight down to the sound of his voice, knowing that he was calling for her.

"What!" She scowled, obviously annoyed and has been infuriated as well as stressed ever since the night he left.

"You might want to hear this." Earth X Oliver said in his calm tone and manner without the voice modulator in his mask.

"Agent Lance reports that Barry Allen from Earth 1 has been released from the Speed Force prison. - This one holds extreme power and strength and can lead our planet."

This struck a chord in her thoughts. What she would give to spend another second with him, even if it isn't her Barry, just seeing that handsome face again would give her hope.

"Bring him to me and I will be the judge of strength and power." She tried in a strong tone, slightly excited but slight depressed knowing it wasn't her Barry.

But it could be.

A/N: First chapter done, firstly Barry and Kara were not together before the speed force incident but Earth X Kara and Barry were - and Earth X Barry is stuck in the speed force.