Note: Hi everyone and welcome to the premiere of FROST, exclusively on fanfiction for its initial run. There will be 15 episodes, and as such 30 chapters posted, lots of two making up one episode. Hopefully, there will be a part uploaded per week here, depending upon my ability to get them written ahead for my examination weeks at school. Anyways, thank you for your constant support to everyone who has been involved!

Synopsis: Following the events of The Flash's Season 3 finale, Caitlin Snow (Danielle Panabaker) travels to Keystone City to separate herself from the rest of Team Flash so she can discover who she is now. However, Keystone isn't quite like her home, overrun with crime lords, evil metahumans and corrupt bureaucrats. Caitlin finds that she is unable to separate herself from the pain of others, and must accept who she is to save the innocent. Whilst she attempts to accomplish this task alone with only her sought after trainer Ted Grant (J.R. Ramirez) knowing the truth, it becomes obvious that she can't walk this path alone. With new friends police officer Eve Eden (Kirsten Prout) and genius IT specialist Earth-1 Lena Luthor (Katie McGrath), along with a blast from the past in Hartley Rathaway (Andy Mientus), Caitlin's journey no longer has to be one of solitude. Even so, the threats she will face are unlike anything she has ever witnessed before and will test her in ways she didn't even believe were possible.

There aren't many nights that Caitlin Snow gets any sleep. Tonight was yet another of those. Even though her eyes were closed, there was an inevitability to being unable to stay that way for long. She still felt the power coursing through her veins, the fear of being unable to control her abilities and hurting someone she loved plaguing her mind. The issue was, these weren't just fears. No, Caitlin Snow had hurt her friends. She was willing to kill Cisco Ramon multiple times even when she knew he was right about Savitar using her. She was going to kill Tracy Brand all because that metal man had told her it had to be so. It still felt like a bad dream, which might be why her mind always attaches sleeping with them. Her sweat was warm on her cool skin as it ran down her arms, body shaking as the icicle moved closer and closer to Cisco's heart in her mind...and then in an instant she was jarred awake. Chocolate orbs blinking, pale hands running through her snow white hair as she tried to compose herself. Her breaths were ragged and strained as tears were caught in her throat. A hand rested against her chest, almost trying to make sure her heart was still beating, and of course it was, but it was hard, like a drum. Her migraine headache that never seemed to dissipate from her lack of sleep pounded in her ears as she threw the bedcovers off of her body, seemingly disgusted with their inability to relax her. Her new apartment wasn't anything spectacular compared to what she used to own in Central City, but it was her newfound home. It was akin to a hotel suite she remembers from a childhood she had long forgotten. She remembers the warm air, the sound of waves crashing as she fell asleep. Why her mind didn't choose those memories to fill her dreams, she didn't know. Perhaps she never would. She slept in an old S.T.A.R. Labs sweatshirt much too large for her. Following the particle accelerator explosion, they were as good as firewood so she took some from the facility for herself. Some of them were probably Ronnie's too, although that seemed like a lifetime ago now. She couldn't even tell the difference anymore. Sighing, she slid out of bed, seeing the break of dawn across the horizon outside the window. Even if it hadn't been, she would have struggled to fall back to sleep. After all, she could only take those sleeping pills every four hours safely. Her feet slid across the carpet easily like a skater on ice as she walked to her closet and picked out a hooded jacket to wear along with her workout gear. She did miss waking up to text messages from the team, or going to work and seeing all her friends everyday, protecting the city they loved together, but she truly believed, after what she did, she didn't deserve such happiness. Whilst lacing up her runners, she quietly hummed along with the music on the radio which she left on for the whole day, a grounding mechanism. She quickly did her hair up into a streamlined ponytail, placing the hood over it so she wouldn't have to explain to any onlookers why her hair looks like it does. Thankfully, Team Flash marathons of Game of Thrones had given her a good excuse. In all her time in medicine and being a bioengineer, Caitlin had never figured out how memories worked, and why some could be so terrifying they could leave someone scared and breathless and others be so bright they lead to a smile. Just another secret she wouldn't understand. Taking a deep breath as she buried such thoughts inside her, she opened the door and headed out onto the road.

The cool air of dawn became apparent the moment she stepped out from the apartment building, the dew on the grass glistening against the sunlight. Buying an apartment just outside of the city allowed her to at least enjoy some spoils of the environment which she felt like she couldn't connect to anything. In Central City, there were parks and trees all across the city, almost an instantaneous mood lifter. Keystone had none of those remnants of happiness, replacing it with the stench of pollution and worn down houses, especially in the suburbs. Caitlin often saw people on the side of the street, clambering for money, to which she often gave some spare change to. They would smile in return at the kind gesture and explain that no-one else gives them such kindness. Perhaps that too was a Central City thing.

The other issue with Keystone was the lack of abandoned warehouses or restaurants she could utilise as a base of operations, something she had been searching for for what already seemed like an eternity. Although, working out of her house would make it much easier to explain why she was working by herself. As the break of dawn broke, she realised even it couldn't lighten the mood in the city. As she ran on the concrete path, there was no warmth or happiness, merely shadows in every corner, lurking at the back of every alley, ready to jump out at any moment. Anxiousness always filled Caitlin as she did her morning runs, not because she couldn't protect herself, but because she undoubtedly knew someone was being mistreated or hurt while she was doing her workout. But from all those years at S.T.A.R. Labs, she remembered that no matter how powerful she was, she couldn't save everyone. Not even Barry could do that. Taking a deep breath as she ran, she steeled her mind, attempting to once again rid her thoughts of Team Flash, shaking her head as her joggers pounded on the ground.

The night was when the worst of the city came out, those who were unable to survive because of the low economy turned to stealing to service their needs. And those who were unwilling to give their hard earned jewellery or money to a thug often get put down. That was when she came across the place she had been looking for, the old gym in Keystone. It had been rented by a man whom had trained another woman to give her enough fighting skills to be a vigilante. She had decided that she would get through to him eventually about her want to make up for her mistakes, and her hope was that she could show him how much it meant to her. However, she was still worried about using her powers for much more than was necessary and also keeping her identity as Killer Frost secret. She was worried, she knew even her friends struggled to look at her similarly. She had paused for a minute looking at the gym. Just like the rest of the city's landscape, it was old and wearied, obviously because of its utilisation over the years. Ted Grant only took over following his move from Star City, but according to him, homeless people were living in it prior to the new ownership. As Caitlin moved inside, she felt the wood underneath her feet, the thud of her sneaker as she moved on the gym's tattered floor. The sound of a man punching a boxing bag reverberated around the interior and Caitlin deciding to move towards it. The middle of the gym had a full ring, the heat obvious due to the lack of coolants such as fans and air conditioners. Ted had stopped punching the bag to look over at her with his arms crossed over his chest.

"Back again?"

Caitlin nodded at Ted's question, walking closer to him around the ring. Ted shook his head at her before turning back to his boxing bag as if she wasn't even standing there.

"You can't just ignore me Ted. I need your help."

Ted stopped punching, a look of annoyance on his face as he began to take his gloves off as he spoke.

"To what? Get yourself killed? I can't train someone like you, not again."

"Why not? All I want to do is help this city. Surely you have seen just how devastated it is. People steal to survive, kill if they need to. Crime is bigger here than even in Starling City when the Arrow began his vigilante days." Caitlin looked at him with brown eyes hardened by all that had happened to her.

"I see it in your eyes. The same fire that was in Laurel's. I'm sure you think that's a good thing, she was such a great vigilante." Ted's expression was one of honour and respect, dropping almost automatically with his next words. "Until, an arrow penetrated her chest. That- that was my fault. If I hadn't trained her, she wouldn't be in the ground now." Caitlin paused before she responded, not going to say something she didn't truly believe in.

"Ted, I'm not going to say Laurel wouldn't want you to blame yourself because I know how this feels. Being directly responsible for the death of someone you care for. But Ted, you can't just ignore the rest of this city. They need someone to protect them."

"You said it yourself. The crime wave is bigger here than even in Starling. Maybe you will help some people, but what change will you actually bring about? What do you have that she didn't?"

With her hands at her sides, Caitlin let the beginnings of ice particles surround her hands, cool mist almost immediately dropping the temperature in the room, as she raised it to show Ted. The mist almost didn't appear to be real, it just ran off of her hand like a liquid, yet definitely had the properties of a gas. Caitlin had figured that it was similar to liquid hydrogen or nitrogen, which was so cold that it freezes the air around it and transforms it into a gaseous liquid. Ted's eyes widened as he looked at them, stunned by the power she possessed.

"As you could see, I could already be out there, saving lives. But I need to be able to beat someone in a fight without using…these. It's way to easier to critically injure someone with them than with fists"

Ted was still unconvinced, and still struggled with what he feared, "This doesn't change anything. And I need to go get some breakfast so if you'll excuse me Frosty" Ted turned to the door she had come in from after his words, but as she spoke, his movement ceased.

"Ok. Well I'm still going to go out tonight. No matter what." Caitlin's voice was firm, like it was a fact, and whatever he decided to do wouldn't affect her decision. "Would you prefer me to be untrained and die because of it, or live because you helped me learn how to punch?"

Ted's sigh and look of resignation was enough for her, a smile washing over Caitlin's face.

Being a police officer was something Eve had wanted to do her whole life. Seeking justice, honour and truth to find exactly who had committed crimes and helping others with trauma was very close to her heart. The blonde's work had been instrumental in many cases, because she was willing to look deeper than anyone else. It was such a quality that had caught the police chief's attention, of which he told her she would be undertaking some duties of a detective. It meant that she may be able to see footage, or present her beliefs upon what may have happened. Today, one of their own detectives was murdered, frozen in their sleep. All they had to go on was a figure, but everyone seemed to have a firm understanding of who it must have been. Central City's Killer Frost. She must have made her way over to Keystone with deadly intentions because there wasn't anyone else who could even go about freezing another body. However, Eve wasn't convinced. The footage showed a hooded figure who attempted to remain hidden. Killer Frost was already a known felon, hiding from cameras wouldn't change any of that. Also, the figure doesn't seem to ever touch Detective Torres, meaning that either Killer Frost has reached the stage where she doesn't even need to touch someone to make them suffer or even kill them or that it was someone else. Eve reached down to pick up the case file on the metahuman they had had sent over from the Central City Police Department, and despite what her name could mislead some to believe, she had no homicides under her case files. So, Eve struggled to make the jump like all of the others around her already had. With that she walked into the chief's office. The chief, Jaimie Bennett, was one of the best men Eve knew, because of his compass for justice. She looked up to and respected him, hoping that one day she would be able to have a role similar to his.

"What have you got Officer Eden?"

"I don't think Killer Frost did this sir. I don't think we can assume that just because it was ice it was her. Captain Cold used an ice gun as well, what if it was him?" The Chief green eyes smile at Eve's deductions as she continued, "Frost hasn't really been one for stealth either, remember the ice slide?"

"Tomorrow, you can interview the new detective, Alexander Petrov. He was the last man to see Detective Torres alive. No one else is getting that opportunity, don't let me down Eden" The chief speaks strongly and firmly, reminding her of the importance of this assignment. This was a cop killer, none of those could be tolerated. Especially in a city which was about to implode on itself into anarchy if one mistake was made.

"Thank you sir."

Ted raised his fists covered in the boxing gloves in front of Caitlin, whose workout clothes were drenched with sweat. She didn't know if the reason she was constantly on the mat was because of how good he was, or how bad she was. But through the whole thing, she had realised she didn't even have an inkling of Killer Frost inside of her. The voice which had never stopped talking to her, even when she wore the necklace, trying to make her do things that she knew were wrong, wasn't actually there for now. But that was when she realised that it wasn't as if they were different people, they were one and the same, and an acceptance of each other, which came when Savitar was about to kill her best friend, was the only way to survive. Even though it also meant trying to deal with the suffering she caused. She closed her chocolate hues, feeling anger rushing through her mind as she thought of all she had lost and all she had done. The memories flashed through her mind as some of the worst memories came to the forefront. With rage, Caitlin attacked Ted with her fists, and although Ted blocked them, at least she felt like she knew she could do some damage with her fists on someone less trained. Using her leg she connected directly in Ted's stomach with a hard kick, which startled the man, pushing him slightly off of his stance. Ted looked at her, both stunned and surprised.

"Where did that come from Snow?"

Caitlin began to take off her gloves, slightly astounded by what she had just done as well. Where did she learn to kick like that?

"I don't know."

"I can't help you if you don't tell me. Is that a side effect of your powers, knowing how to fight like that?" Ted paused as he looked at her "Or is it something else?"

"Look, Ted. I don't need a psychologist, what I need is boxing trainer."

"What you need is someone to listen to your pain. Just like Laurel did. Anger is a massive part of becoming a good fighter, but if you can't channel it, you can't become anything." Caitlin turned around and looked at him, shaking her head as she quickly zips up her hoodie over her pale arms, her right hand holding her bag.

"You wouldn't understand."

"Then help me understand." Ted's face was pained, knowing that if she just let someone into her walls after what he just saw, she could be exactly what she wanted to be.

"I'll think about it" She throws her hood over her white tresses as she walks out of the gym into the cool night, leaving Ted lost in his thoughts.

The glass doors opened in front of the black-haired woman as she walked out of the computer retail job she had been working at whilst still studying IT at Keystone University. She was on her phone, speaking to her mother, high ponytail tightly bound to her scalp as she moved along the ground, heels tapping against it.

"Yes Mom I'm going to be home in 15 minutes" Her voice was soft, as if she was whispering a secret even though she was alone in the alleyway. Her days were often full, her IT degree lectures taking up her mornings and her job destroying any possibility of an afternoon or evening to herself, even though it didn't even completely pay for the degree. Her mother often told her to quit the job and just let her pay for the education herself, but she didn't want to do that. She was 24 and she needed some sort of independence from her family, even though Keystone's economic state didn't exactly allow for it. Lena's crimson handbag was over her shoulder, standing out from the snow white blouse she wore, dark hair swaying from side to side as she nodded, eyes focused on the road ahead as her mom begun rambling about something that happened while she was in University.

"Mom, can you continue this story when I get home? It's just really loud and I can't hear very well." Lena sighed softly as she spoke, not trying to implicate any negative undertones but also coming up with a strong enough excuse that her mother might buy. After ending the call, Lena began her trek through the lower economic parts of the city, beggars and the homeless asking for money. She tried her best to give them each a little bit of change, but the population of these streets have only increased over time. Lena walked through the streets as fast as she could, head on a swivel to make sure no one made a move towards her. However, all of sudden, a man moved towards her in a flash before she could react and pulled her purse off of her shoulder and took off. Lena's surprise at the action already started her off with a disadvantage, disregarding the fact that she was wearing heels and had never been too athletically inclined. She called out for the man to stop but he continued, turning down an alleyway. Lena felt a slight pain in her side from the overexertion in just a few seconds. She only just made it up the alley when she saw what appeared to be a woman with a hood covering her face launch an ice blast at him, knocking him onto the ground. Lena widened her eyes, her mind trying to figure out what she had just seen. The woman's eyes seemed to meet Lena's and once she realised that Lena had seen what she had done, she took off, running in the opposite direction from the dark-haired woman. She tried to call out to her,

"wait!", but the hooded woman kept her pace, getting further away from her until she was unseeable in the night. The Luthor was undoubtedly not going to be able to keep up with her but what she did do was call the police as she ripped her purse out of the man's grasp still shocked at what she had seen. There was only one thought that filled her mind throughout it all.

She had to know who that woman was.

Suffice to say, Officer Eden wasn't expecting a call from a girl whose purse had been saved by a woman with ice powers, considering that was the exact suspect for the detective's murder. Even though she herself didn't believe it, everyone else did, and being the only officer on patrol in that area, she had to at least check it out. Her talk with Petrov would have to wait until she had taken this woman's statement, even though theft was a usual occurrence on the streets of Keystone. She had to hear about this vigilante. Climbing into her small green car, the paint faded from its obvious use, she placed her foot on the ignition quickly and headed off. Once reaching the crime scene, Eve climbed out of the car and walked briskly over to the dark haired woman whom was still staring off into the distance in the direction Caitlin had taken off in.

"Lena?" The officer called out, trying to get the other woman's attention. Lena turned to see the officer and seemed to take one more look in the distance, struggling to take her eyes off of the possibility of seeing the woman again.

"Officer Eden, I didn't expect to see you, usually theft is ignored by the police."

"Well, you would be right about that. However, your case involves a person of interest in a murder investigation."

"So are you going to arrest him?" Lena motioned to the man whom was still unconscious, even if the ice had eventually dissipated.

"No. Arresting him and locking him up is actually a better life than living how he has been. It's even possible that he only stole from you to get that chance." Eve looked at him without a real care in her green eyes. "Just don't come down these streets again, ok?"

Lena shakes her head, trying to understand the officer's decision. It wasn't as if she was an expert on the law, but she had watched enough television to know that police should arrest the criminal and remove their freedom from them. She really was learning something new everyday.

"So if he's not the person of interest…does that mean my hero is?"

"Afraid so." Lena shook her head at Eve's claim.

"You think she killed someone? That doesn't make sense." Lena couldn't believe how emotional she felt as she spoke, wondering exactly why it mattered so much what happened to someone she didn't even know the name of. "She could have killed this man"

"Well she nearly did." Eve pointed out.

"No. She had enough control to not let that happen." Lena spoke resolutely, with a firm belief of her truth, "When I find her, I'll prove it to you."

"Wait…you're going to find her?" The officer was surprised that a civilian was so interested in a woman who could be dangerous, especially when it seemed like she had no idea who she was under the hood.

"Yes."

"Ok well, when you do, make sure to call up the Central City Police Department. I think they'd be very interested in the finding of Killer Frost." Eve had a glint in her eye as she spoke, almost trying to be funny, the joke completely lost on the IT expert.

"Killer Frost?" Lena paused and raised a brow. "She hasn't even killed anyone yet and you're already calling her Killer Frost?"

Eve couldn't help but sigh at the other woman's insistence to defend Frost. She did have to admit that it didn't make a whole lot of sense for the ice queen to kill someone and then save someone in the same 24 hour period.

"Fair enough. Ok Lena, make sure to keep me in the loop on your private investigation."

"Thanks, but I won't." Eve turned around with a smile on her face as Lena continued, "Until you realise that she isn't who you think she is, you can forget about even getting close to finding her."

"Good luck." Eve's smile still lit up her face until she turned around and replaced it with a frown as she walked back to her car, ready to make haste to Petrov. Killer Frost didn't kill Detective Torres, she was more sure of that than ever before.

So if she didn't. Who did?