So a little idea I had that I was "forced" to write by my friends over in the Jelsa Haven Discord server. Thanks guys, I hope you like it.

Special thanks to MiniNoire for being my beta! Thanks girl, couldn't do it without you! Another special thanks to xValiantWarriorx who helped me with my cover. You da best girl!

Anyway enjoy!

Chapter 1: Death Stalks The Streets

Late August 2007

It was supposed to be a late summer's evening. People were supposed to be soaking up the last few days that summer had to offer. Instead, fear was stalking the streets. There was a monster lurking in the shadows. A monster who had just claimed their fourteenth victim – the third in a matter of weeks.

Bunnymund chewed on his cigarette as he stared at the mangled body of what used to be a young woman. She couldn't be more than twenty-four, twenty-five. The killer had used their knife to slice open the chest, exposing the insides and coating the ground in dark-red blood. Forty-seven stab wounds to the torso, abdomen and face. Only someone who was a true psychopath could really be capable of this horrific crime.

"Is it him?" Bunnymund's partner, Einar Falk, asked as he approached the body.

"Looks like it, yeah," Bunnymund gave an angry expression down at the body. "We need to catch this guy, Falk. If we don't and this guy gets away with it…" A low growl came out of him. "We need to stop him."

"Agreed."

The pair of them started to search around the scene, looking for the smallest hint of anything, anything that could be of use to them. So far, the killer had been sneaky and clever. No evidence had been left at any scene but one.

They had only been lucky once. The first victim, a British immigrant by the name of Elizabeth Best had managed to scratch her killer leaving DNA under her fingernails. It had been their only lead since her murder five years prior, back in 2002. Since then, nothing. No eye witnesses, no DNA, no fingerprints.

Bunnymund hated a clever killer. However, he was sure of one thing. A clever killer would get arrogant from thinking he was getting away with it. That would make him sloppy and make a mistake. Hopefully, today they were going to find that mistake and save anyone from having to go through what that poor girl went through.

The pair of the scowered the brush while other officers were looking through the river nearby. The victim hadn't looked like she had been in the water, but the killer may have thrown something in there.

"Victim's name is Therese Larsen, twenty-three, well according to her driver's license," Falk said. "I found her wallet," he held up a red leather purse.

"Anything of interest in there?" Bunnymund asked, as he walked – with much difficulty through the thick brush – towards his partner.

Falk went through the purse. "There is still cash in here – around sixty dollars – so the motive is definitely not robbery."

"I think we ruled that out five years ago," Bunnymund said, fighting a small twitch of a smile on his face.

"There are receipts for a local petrol station," Falk continued. "Dated yesterday at five forty-six. That could line up with time of death. Several credit cards from the local bank and some membership cards including the gym that is nearby."

"We should check the security cameras at that petrol station," Bunnymund said looking at the receipt. "Then at the local gym. If it is nearby, she could have been coming from that when she met the killer." He paused as he looked at the cash in his hand that Falk had handed him earlier. "These bills are in sequential order. Are there any ATMs around here?"

"Yeah," Falk suddenly looked excited. "Right by the gym. She could have made a withdrawal and then met the killer right then and there. Perhaps the ATM footage would have picked it up."

"Let's hope we get lucky this time."

Anna was walking down the highstreets of Arendelle, on her way to meet her sister at their family's office, when a headline of the local newspaper caught her eye at the newsstand on her route. She stopped in her tracks to read it.

Arendelle Ripper strikes again – town fearful for their lives

it read. Fear and panic wrapped their fingers around her and started to throttle her. Another victim? Didn't they just find a victim a week ago? She grabbed the newspaper and started to read it.

"Police have no new leads or made any arrests," she whispered to herself as she read the article. She threw the newspaper down. How could the police not have any leads? A madman stalked their streets and they had nothing? She stormed down the street, her footsteps landing a little bit more firmly on the ground than she intended.

"Whoa, someone is in a bad mood," her sister said as Anna stormed into her office. "What is it this time? Please tell me Kristoff didn't do anything too stupid."

"Thankfully Kristoff is an angel like always," Anna sat opposite her sister. "No, I am just mad at the police. There is a fucking killer walking around and they are doing nothing. Like you think they would have a lead or someone in custody by now, but nooo, they don't. They are just sitting on their arses probably shooting the weather."

"I am sure the police aren't sitting on their arse chit chatting," Elsa said trying not to laugh. "Besides, this killer is probably smart, sophisticated and charming," a small smirk was playing around her lips. "No wonder the police can't catch her-him. I mean him."

Anna leaned back in her chair. "At least we have that barbeque with Bunnymund and Tooth this weekend. Maybe I can grill him about the case."

"Anna, don't," Elsa said, looking like she was suppressing a laugh. "I am sure Bunnymund is working very hard on the case and doesn't need you breathing down his neck."

"Yeah, you're right, you're always right," Anna added the last part in a grumble. "So, what are you working on?"

"Oh," Elsa let out a sigh. "Just a new project for Uncle Klaus. He needs new strategies to help combat the fear that has gripped Arendelle."

"People aren't in the mood for winter gear supplies?" Anna looked sceptical. "Winter is just around the corner."

"I know," Elsa did another sigh. "It's September next week. I don't think I am ready for autumn just yet. I have been enjoying summer."

"Even with this killer on the loose?"

"Oh, I have particularly been enjoying that," Elsa said with another smirk that Anna raised her eyebrows at. "You know how much of a serial killer junkie I am."

"You are," Anna laughed. "God, I remember you staying up to till four am watching those tv shows, how you didn't get scared, I'll never know."

"Let's just say, I was enraptured with it." Elsa got to her feet and grabbed her coat. "So, lunch?"

"Let's do it," Anna stopped as Elsa threw on her light jacket. "Hey what's the dark stain there?" She pointed at a dark red spot that was below the collar.

"Oh damn," Elsa tried to scratch at it. "Must be paint. I was at the warehouse earlier today and maybe some red paint got on me."

"They really should be more careful with those machines," Anna said as they walked out the door together. "Who knows what toxic substance could land on you?"

"I know," Elsa shook her head in disbelief. "So, Italian?"

Bunnymund could have whacked his head against his desk. There had been nothing from any of the footage that they had found. At least they had a timeline of their victim's final movements. She had gone to the gym as predicted and stayed there from six to eight before getting cash out at the atm. Cameras from the ATM and the gym confirmed this. However, what the cameras had been unable to confirm were anyone interacting with their victim. The manager at the gym said that Miss Larsen came in three times a week at the same time and stayed the same amount of time. Never had an issue with anyone.

He looked back over the ATM footage. It wasn't the best – grainy and hard to make out. Apart from their victim, the only other thing was a car that was parked beside her but the car stayed there for another hour before leaving. The coroner's report was on his desk. The time of death was around nine to nine thirty. Which means she was killed just after she left the gym. The place where she was found was a shortcut route back to her house.

His working theory was that she cut through the brush as usual and the killer had been waiting. He had also theorised that maybe she had been stalked, but talking to people who had last seen her hadn't mentioned any strange man following her.

"The case is going that well huh?" Falk walked towards him, a file in hand. "Thankfully I have some news."

"Please tell me it is a lead on the killer," Bunnymund begged him.

"Could be," Falk laid the file down in front of him and showed him photos. Bunnymund picked them up. They were security camera stills. "A local store down the street had working cameras – I know, who did they bribe? – and they show our girl," he pointed at a figure who was clearly Therese Larsen, "and someone behind her." He tapped on the figure that was walking just several metres behind her. The figure was dressed in a dark coat and a hood was pulled up, obscuring their face.

"Well, that could be anyone," Bunnymund said.

"True," Falk said, "but we can estimate the height of this person, around five foot six, five foot seven and there is this," he produced a second photo. It was a zoomed in image of the jacket the customer was wearing. It had the Winter's Industries label on the top part of the right-hand sleeve.

"Oh, that is interesting," Bunnymund said. "I know the Winters Industries have thousands of customers but at least this can help narrow it down."

"There's more," Falk looked delighted. "I've spoken to a rep of the company. Apparently, those jackets were made last year for all the employees as part of a Christmas party gift."

"So, the killer is an employee at Winters Industries?" Bunnymund could have leapt for joy. "Well we could get a warrant for all the jackets and do blood testing on them and see if anyone matches the profile of the killer."

"Male, mid-thirties to mid-forties, white, a loner – unable to make a relationship last and probably never had a serious one, has a deep hatred for life, probably has animal abuse in their history," Falk said ticking off the killer's profile that had been ingrained within them for the past five years. The FBI had been called in to give it earlier in the case. "Has a low menial job – unable to get any joy from it. However, has an IQ higher than what is required for that job. Also appears non-threatening as despite the high alert that is around, this killer is able to get close to their victims."

"Let's just see that anyone at Winters Industries fits that. Thankfully I know people there who may help us out."

Bunnymund took his phone off the handle and started dialling Elsa's number. Hopefully she would provide the information without a warrant.

"Honey, I am home," Jack heard his wife called as she walked in through the door of their house.

"In here, honey," he called from the kitchen where he was fixing up dinner for them and their two children – a son Leif, seven, and a daughter, Sigrid, five.

Elsa walked into the house and gave her husband a lingering kiss on the lips and then another one. There was something bouncy about her tonight.

"You're in a good mood, did your uncle approve your strategies or something?" he asked as he placed a piece of steak in front of her seat as she sat down.

"Just been in a good mood, you know?" she said. "Oooh, I see you made garlic butter sauce to go with this. You know what I like." She shot him a flirty smile.

He winked back. "You know it babe," he said as he took a sip of his wine.

The four Frosts ate dinner while exchanging pleasant chit chat. Jack couldn't help but feel how lucky he was. He had a beautiful, intelligent, amazing wife and two wonderful kids. Life really couldn't get any better than this, could it?

Early September 2007

Monica Nilsen was walking down the streets of Arendelle, it was nearly ten o'clock and she was walking home from a date. The date had been, iffy, to be generous. The guy just hadn't been at all interesting. He just kept talking about the changes in petrol prices. Like yawn! Who was interested in that kind of thing? She was just hoping to get a little lucky tonight but instead, she was walking over to a friend's house to crash.

As she walked down the street, the only light came from the streetlights from around her. The whole scenery was rather nice as it was very quiet and very comforting. At least if her date went poorly, she was about to enjoy some rather pleasant company with a girlfriend.

"Excuse me," an unknown voice caught her attention and she turned around and saw someone walking towards her. In the dark it was hard to make out any features.

"Yes?" she said kindly.

"I am lost and couldn't find this address," the person asked, producing a piece of paper.

As Monica leaned forward to get a closer look at the piece of paper, she felt a searing pain in her chest. As she looked down, only for icy fear to grip her heart at the sight of the blood that was pooling out of a fresh wound that was inside her chest. Feeling her strength waver, as she collapsed to the ground, getting the last view was of the person with a bloody knife in their hand. A malignant smirk was stretched across their face.

"You're mine," were the last words she would ever hear.

A/N: So, hopefully everyone liked that chapter! More to come!