! Warning: This story may contain adult themes, such as nudity, sexual content, torture, mass murder etc. Reader discretion is highly advised. !

Disclaimer: I do not own DC Comics or the CW TV shows Arrow, The Flash, Legends of Tomorrow, Supergirl or any other characters or elements pertaining to the mentioned franchises.

"Caitlin, what happened here?" Barry asked, trying to understand.

"Mercy and I were in the hall, talking. The next thing I know, someone entered through the windows and sliced her. And he tried to kill me too but I got lucky. This whole water thing, it just kicked in on instinct." Caitlin explained as she looked at the cuts on her clothes.

"What were you doing here, Caitlin?" Barry asked slowly and carefully. "Were you going to kill her?"

Caitlin hesitated but the look in her eyes told him what he needed to know as he sighed. "I wasn't going to let her walk away with what she did." She explained. "She was never going to stop chasing me. But when I came here… she didn't recognize me. And then I realized that Felicity had something to do with it. She was the only one, who knew I was after her."

"Felicity told me. She told me everything." Lyla said. "I understand why you wanted revenge but you're not a killer, Caitlin. I wasn't going to let you get more blood on your hands. So, I used this." She showed an interdimensional extrapolator. "I reached out to J'onn J'onzz, explained everything to him. He erased her memory."

"If you didn't kill her, then who did?" Barry asked.

"I don't know. She didn't know who I was, so I figured, just live and let live. I was about to leave, when someone else entered through the windows. I don't know who it was." Caitlin explained.

"And he did this?" Lyla turned to Mercy's corpse and Caitlin nodded.

"He had knives. And he was fast. Really fast." Caitlin said.

"Like me?" Barry inquired and Caitlin shook her head.

"Not as fast as you but fast enough to slice her like that with a blink of an eye. Definitely a meta. A speedster but not as fast as you." Caitlin said.

"Do you know why did he want Mercy dead?" Lyla asked.

"He said that she took something from his people and that they wanted it back." Caitlin explained. "And then she said that they were never going to find it and that's when he killed her. I don't know, maybe it was revenge for 33.1. There are a lot of metahumans that would have wanted payback."

"I don't think it was payback." Barry said as he examined Mercy's corpse and pointed at the cuts. "See those wounds?"

Caitlin and Lyla looked closely. "They were all to her stomach."

"If I wanted revenge, I would have gone for the jugular or the heart or carotid artery." Lyla said.

"So he was looking for something inside her stomach." Caitlin realized.

Barry picked a plastic bag, putting his hand in it and using it as a glove as he put his hand into Mercy's opened wound before he pulled out a bloodied key.

"A key? Why did the speedster want a key?" Lyla asked, narrowing her eyes.

"Good question." Barry said before he turned to Caitlin, who was still a little in shock. "Caitlin…"

"I…" Caitlin stepped back and looked away in shame, afraid of looking at Barry.

"Cait." Barry held her shoulders. "It's going to be OK."

"Barry, I…" Caitlin was lost for words as tears filled her eyes from being away from Barry for four months as she broke down and cried as Barry hugged her.

"We're going to figure this out, Caitlin. I promise." Barry assured her.

"I'm sorry… I'm so sorry…"

Elsewhere

The speedster entered a circus tent, where Manchester Black was looking at a mirror.

"Well?" Manchester asked the speedster.

"Graves is dead. I didn't find it. But there was someone else. Another metahuman. It was Caitlin Snow." The speedster explained and Manchester raised his brows as he turned around.

"That's impossible…" Manchester said.

"She almost froze my arm, look." The speedster showed the frostbite on his arm, making Manchester raise his eyebrows.

"So, Snow is alive. Interesting development."

"What do you want me to do with her?

"Don't do anything yet, Johnny." Manchester ordered. "Perhaps we can persuade her and Allen and their friends to come to our sanctuary. We need that device though."

"Allen has a lead." Johnny, the speedster said.

"Follow them. Discreetly. Once they have the device, take it." Manchester ordered as Johnny was about to leave. "And Johnny, no corpses this time. Knock them out if you have to but we don't need the government on our arses again. I don't want this to turn into bloody mess."

Johnny nodded before speeding away.

Star City

"Caitlin is alive…" Oliver whispered as Laurel sat down in shock and Felicity told him the news.

"I wanted to tell you so many times, Oliver, I swear." Felicity said.

Oliver wiped his face. "What did Barry do?"

"He came looking for Caitlin. That's all I know." Felicity said. "Oliver, I know I messed up but please, give me a chance to make things right, please. I know I have a long way to go but I want a chance to earn your trust back."

"Please…" William entered, with guilty look in his eyes. "It's not her fault what happened with Caitlin. I snuck aboard and I wanted to help. If anyone should be to blame, it's me."

Four months ago

"What were you thinking, sneaking on the jumpship and trying to take on trained soldiers?" Oliver yelled at William, who looked ashamed. "You're eleven years old!"

"I wanted to help—" William tried to explain.

"You're just a boy! What could you have done?! They could have killed you!" Oliver snapped.

"Dad, I—"

"No." Oliver interrupted. "You… stay away from this. And you are not going to go anywhere my or Barry's business and anywhere near Felicity. Her ideas get you killed."

"Dad…" William paused.

"You are not going to get involved into this, ever again. Understood?" Oliver snapped.

Present

Oliver sighed. "Give us a moment, please, William."

William entered his room as Laurel and Oliver turned to Felicity.

"If it wasn't for her, Dinah and I would be dead, Ollie, or worse." Laurel pointed out as she held Oliver's hand. "I think she deserves another chance."

"Oliver, I know I have a long way to go… but, please, give me a chance to earn your trust back." Felicity begged. "It's not like you didn't mess up like that before. I want to make things right as best as I can, please… I am begging you."

Oliver considered for a minute as he turned to the wall. "I don't know if I can trust you with getting involved into this again… but you did try to get William to safety." Then he made up his mind. "OK but everyone is going to keep an eye on you. And you are not going to do anything behind our backs, all your ideas and decisions will be discussed with me and the rest of the team first. Understood?"

"Thank you." Felicity nodded. "I swear, I'll do my best not to make you regret it."

Felicity then entered William's room carefully as he looked at her, unsure.

"Hey."

"Hi."

S.T.A.R. Labs

Caitlin entered the Cortex, where Harry and Wally and Cisco were looking at her in disbelief and shock and as soon as it faded away, Cisco rushed to her, hugging her as tears formed in his eyes and she couldn't hold back the emotions she had buried, anymore either as she started to cry too.

"You're alive… I can't believe that you're alive…"

"I'm sorry… I'm so sorry…"

"Cait." Cisco held her and as she was sitting down at the stairs. "It's going to be OK."

"I've done bad things, Cisco… and it wasn't Frost doing it… it was all me…" Caitlin whispered. "I've killed… because I wanted to—"

"You were angry and wanted revenge. No one can blame you for that." Cisco pointed out. "What hasn't changed that you're still my best friend."

Caitlin turned to him, unsure. "You haven't given up on me? Even after what I've done?"

"Never." Cisco said as he smiled.

Gotham National Bank

"I appreciate that you guys came with me." Lyla said as Barry and Ralph accompanied her.

"Anytime, Lyla." Barry said.

"If the knife guy is gonna show up, we're gonna catch him." Ralph assured her.

"Here you go, Miss Graves." The bank manager handed Lyla a deposit box. "Let me know when you're done."

"Thank you." Lyla said. She put the key into the deposit box before opening it and inside they found…

"A compass?" Ralph narrowed his eyes as Lyla picked it up and tapped it.

"A broken compass." Lyla said.

They heard the door knock as Barry spoke up. "Yeah, just give us a minute."

The door opened as the bank manager fell down with cuts on his back as the speedster that had killed Mercy showed up, with knives in his hands. "That doesn't belong to you."

Ralph stretched his arm, attempting to restrain the speedster but Johnny sped away before Barry threw him against a wall. Johnny threw a knife at Lyla but Ralph used his hand as a trampoline as it bounced back at Johnny, who caught it before he and Barry engaged in a superspeed fight, with Barry and Johnny exchanging blows, while Barry was dodging the knives before Johnny realized that he was getting himself in over his head and sped away. Barry followed Johnny into an outside alley, who threw a small ball that exploded, blinding Barry for a moment and as his vision cleared, Johnny had already managed to disappear.

"Infuriating, when someone is as fast as you, is it, Mr. Allen?" A deep male voice said as Barry raised his head and widened his eyes to see a man in a bat suit.

"Holy crap. I thought you were an urban legend."

Star City

Felicity was at the door as she turned to Oliver gratefully. "For what it's worth… I'm sorry for everything, Oliver."

"This is your last chance, Felicity." Oliver growled. "Don't make me regret this."

"I won't. I know I have a long way to go… but I'll do my best to earn your trust back." Felicity promised before leaving.

"Are you still mad at us?" William asked.

Oliver sighed. "I… I honestly don't know what am I feeling. I want to trust you both but… I guess only time will tell…"

"I shouldn't have left the jumpship, I get it. I messed up." William said.

"Look, let's… I think we should all learn to trust each other again. Don't you think?" Laurel offered and William and Oliver nodded in agreement before Oliver's phone rang as Laurel picked it up. "It's Barry."

She handed the phone to Oliver, who answered the call. "Barry?"

"Ollie, how long will it take you to get to Gotham? I think I'm gonna need your help."

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