"Alright, Halstead. Lindsay. You're going undercover for this part of the investigation. You will be posing as a couple at the Burlesque bar, that the girl we found OD'ed behind." Voight demanded.

Erin smirked at Jay as he winked back at her. "Should be easy enough considering we're actually together." She thought to herself.

"Go get suited up then the two of you." Voight finished.

Erin cleared her throat as she entered the back garage of the District.

Jay turned to look at his partner and girlfriend, and walked towards her wolf-whistling. "Damn, my girl looks...". He was cut off when he heard someone else make their way into the back garage.

"You two good to go?" Dawson asked. The both of them nodded as they jumped into the back of Voight's SUV.

Jay put his hand on his girlfriends upper thigh and kissed her neck, just subtly enough so that their boss wouldn't catch them getting up close and personal with each other. "Back into what I was saying before... My girl looks ever so sexy in that green dress, and I cannot wait to rip it off of you after we finish this tonight." He whispered into her ear.

Lindsay giggled quietly, muttering "Stop it!" under her breath.

It had to have been the best undercover job they had done in a long time. Within less than an hour, Halstead and Lindsay had managed to track down and arrest the owner of the Burlesque bar who had been buying, importing and exporting hundreds of thousands of dollars of heroin in and out of Chicago.

"My baby did well tonight." Erin complimented her boyfriend as they walked out of the elevator towards Erin's, or as they had started to call it, their, apartment.

Erin had barely shut the door of the apartment before Jay pushed her up against the wall, began to run his hands up and down her body, kissing her neck passionately. "Oh god." Erin cried out, "I've missed this. It has been way too long."

Jay lifted her up, wrapping her legs around his torso and carried her to their bedroom. Within seconds Jay had managed to rip off Erin's dress as promised, Erin doing the same with his suit.

Erin kissed every inch of Jays torso. Jay shivered as tingles ran down his spine, his eyes rolling back into his head in the process.

"Lindsay. We need to make a pact here now. No more than a week without this again. Screw sleep, this is so much better."

"Shut up and kiss me." Erin sighed pulling the sheets over the top of them both.

Clothes, sheets, comforters and pillows were strewn across the bedroom floor. Erin laid across Jays chiselled bare torso, gazing at him as he slept.

"I could get used to this Er. Waking up like this every morning, with you being as perfect as you are." He said, running his fingers through Erin's short blondish brown locks.

"So could I, but if we don't get our asses moving. I can bet you that Voight will kick us into next week." Erin chuckled, pulling the sheets off of Jay.

4 weeks later

Jay took the steps two at a time as he made his way up to the bullpen. He hadn't heard from Erin ever since she had left here last night. "Has anyone heard from Erin?" He asked, worried.

"Not since yesterday when she left here no." Voight replied, placing his mug of coffee on the corner of Halsteads desk. "Anyone else?"

Everyone shook their heads. No one had heard from her. This wasn't like her at all, Jay thought to himself.

"Halstead. Come with me. We'll go check her apartment. Antonio. Atwater. Ruzek. Olinsky. Look for her anywhere you think she might be. Gym. Boxing Gym. Molly's. And check Chicago Med for any recent admissions."

The ride to Erin's apartment was log and silent. This wasn't like her at all to disappear or not tell anyone where she was going.

As they reached the door of her apartment. The two men began to panic immediately. Not only was the door open. It was clear there had been signs of a break in. Splinters of wood from the door frame were scattered over the threshold of the door.

Jay felt hopeless. Not only was she missing, she had been kidnapped. It was clear from the state of the inside of her place that there had been a struggle. Their couch, had been turned upside down, the cushions ripped and torn. The glass from her coffee table was scattered about the room, in tiny fragmented pieces.

But what the two men saw next worried them further. Blood spatters all over Erin's off white wool rug.

Jay sank to the ground, his head in his hands. "Halstead. We'll find her. You know how tough she is, she'll get through this." Voight said caringly.

"I hope you're right Sarge."

Erin was sore and stiff all over. She could barely move. Her head throbbed. Her left hand felt like it had been shattered into a million pieces. She tried as hard as she could to open her eyes, but any slight movement pained her even more.

"How much are we putting her up for?" A man asked someone. His voice was deep, and he had an accent of some kind. It sounded British of some sort, a mix of English and Scottish, maybe?

"There's no way we're doing this for less than 200k." Another man demanded. He was definitely English. She could feel one of them walk closer to her. He hovered over her face and stroked her cheek. If Erin was able to move, she would have given him one of her best right hooks.

His breath wreaked. "And she was so pretty... Before you beat the crap out of her James. Voight is going to kill you when he gets her back."

"Yeah if he gets the money in time. Which I'm hoping he doesn't. Because she was a lot of fun last night." The one with the deeper voice laughed.

What happened? Erin thought to herself. She couldn't remember anything after coming home from work yesterday.

Her train of thought was cut off when one of the men picked her up and threw her into what felt like a chair. She finally came to, opening her eyes. The light was so bright it was blinding, she squinted a few times before she could fully see her surroundings.

The faces she was met with were familiar to her, they were bartenders at the Burlesque club, she and Jay had gone to undercover a few weeks ago.

"Ahh she lives at last." The English one smirked, making his way over to her. "You know even with those bruises, she's still pretty easy on the eyes." He was behind her now. Erin felt something pressed up against her throat, the cool metal was enough for her to realise what it was.

"Smile. Detective Lindsay. This ones for your little boyfriend at 21. Or we show him what 50000 volts looks like on his pretty little girlfriend."

Erin screamed at the top of her lungs. Praying that someone could hear her. She had no idea where she was. "Help me somebody!" She screamed as he pushed the taser into her abdomen. She writhed in agony, almost passing out from the pain.

"No one will hear you down here Erin." The other one laughed before smashing a tyre iron against the side of her skull.