What was she talking about? She must have been referring to the house from last night, but Kara had no idea what could have been in her bag, and she certainly didn't put anything there. She sent back her own text consisting of a row of question marks, and then noticed that her mother was impatiently calling her name, "What?" she asked, matching her mother's tone.

When she looked at her mother, the exasperation was undeniable, "You aren't listening to me. Put the phone down and listen."

"Mom, I'm sorry. I can't right now. I have to go and meet Rachel. She's waiting for me." She moved to gather her keys and bag, but didn't get very far as both her parents were on high alert at this announcement.

"Stop!" Dave said and she froze in her tracks at his volume. When he had her attention, he continued, "You told me earlier that you and Rachel had cancelled your plans. What changed?"

"Where are you going, Kara?" her mother said.

"We did cancel," Kara was quite flustered, but trying not to appear so, "I guess she changed her mind, and now she is out there waiting for me. I can't leave her stranded."

"Out where waiting for you? What did that text say?" Dave said. None of this was making any sense to him.

Kara wanted to stall and think of the perfect answer, but with both of them standing in front of her, breathing down her neck, she had no time to waste. "I'm meeting her at the mall."

"Why are you lying to us?" his voice quiet and steady and that frightened her more than if he had yelled. His eyes narrowed on hers and she had to look away.

"I don't know," she said to the ceiling, feeling herself start to lose control of her emotions yet again.

"Alright, I've had enough of this. Give me the phone." She handed it over as it didn't seem that she had any other choice. He scrolled through her messages and handed it back. "Did you put something in her bag?"

"No, I don't know what she's talking about."

"Call her right now and find out where she is." Kara obeyed, but quickly found that it went right to voice mail.

"It's turned off now," she said.

Her parents went into work mode. Dave grabbed her phone back and, pulling out his own, called his technical analyst to try to get a location. Erin reached for her phone and called Rachel's house to see if her parents had any idea where she was. Erin came up empty handed, but did manage to instill fright into them, as they were not even aware that she had left the house. Dave was more successful and ascertained an address. He ordered Erin and Kara to stay put and then started out the door while phoning his team leader, and best friend, Aaron Hotchner. Kara pulled herself out of whatever trance she was in and ran after Dave, her mother close at her heels.

"No, stop, where is she?" she asked.

Not slowing his pace Dave said, "Looks like the same address from last night. Stay with your mother."

"No," Kara made her way toward Dave's car, "I'm coming with you." She reached for the door handle, but felt herself pulled back and spun around to stare into Dave's blazing eyes. It was hard to focus on anything other than the squeeze of his hand on her arm, but the anger in his voice pulled her attention to his words.

"I do not have time for this. Rachel may be in trouble, and you are staying with your mother." He released her and turned his attention to Erin, "On second thought, take her to the office and wait for me there. Fill Rachel's parents in on the situation and keep your phone on. I'll let you know when I hear something." With that, he sped away.

Kara settle into her stepfather's office once they arrived at the Bureau. Her mother was in her own office with Rachel's parents, who arrived at about the same time as they. The car ride over had mostly been in silence, with occasional reprimands from her mother about being safe and honest. Kara let her talk without contradicting her. She was too worried about her friend to argue.

The couch in Dave's office enveloped her, and she sank deeply into it. There was nothing for Kara to do but think, and that was not a welcome activity. Even her cell phone couldn't keep her company, as Dave had taken it with him. She dozed, but not fitfully, until the voices outside the door caught her attention. She heard Dave, and some other people, presumably his team, and Dave didn't sound happy.

He entered the office with two of his colleagues. The smiles and antics from when she entered the building the night before were gone. She spoke before anyone else could, "Where's Rachel?"

"We don't know. She's missing," Dave answered. Kara let in a big breath of air and stood up from the couch. "Is that the bag you had with you last night?" When she nodded, he continued, "I need you to empty it out for me."

"Why?"

"Just do it, please." She complied by turning the bag out onto his coffee table. They all spent a few moments staring at the contents and then Spencer found what they were looking for. With a gloved hand, he pulled out what appeared to be a small sticker with a skull and crossbones on it.

"I'll take this to be analyzed," he said and left the room.

"I don't know how that got there," Kara said.

"Do you know what it is?" Dave asked.

"Yes, they had them at the party last night. They were licking them. But I swear I wasn't doing it." she looked anxiously at Dave, and while it seemed obvious that she had not been completely honest with him, he believed her, and told her so.

"Who else was there last night?" he asked but was quickly cut off by Morgan, "Rossi, we agreed, man, you can't be here for this."

Dave looked like he wanted to argue, but turned back to Kara, "Ok, listen, you know I trust Morgan with my life, and yours, right?" He continued after receiving Kara's affirmation. "I want you to talk to him. Answer his questions and be completely honest I will be back later. OK?"

"Yeah, but can you check on my mom, please?"

"On my way there, " he kissed the top of her head and walked out the door.

Once he was gone, Derek gestured towards an office chair and she sat. He dragged another one to sit directly in front of her.

"Alright, now we want to find Rachel as soon as possible, so I'm going to ask you some questions about last night OK," when she nodded, he continued, "I'm pretty sure you left some information out when you first talked to Dave last night."

"Yeah, but I didn't lie to him," she said.

"Ok, you told him that when you arrived Justin was having convulsions."

She broke eye contact and looked towards the ceiling, "I guess I did lie to Dave," she said and started worrying her lip.

"Look here, Kara. Look at me. Now I promise you that no matter what happened between you and Dave, you will be able to work it out. Dave loves you and nothing will change that. But right now I need all of your energy focused on finding Rachel OK?"

"Yes," she said.

"Good, now tell me what happened last night."

And she did. She told him everything. How everyone all over campus was talking about the party for a week before and how she and Rachel had planned to go, even buying new outfits for the occasion. They had arrived at around ten and the party was just getting under way. Alcohol was everywhere and the little sticker drugs were filling bowls in the room. Rachel and Kara didn't do any drugs, but they did have a little bit of beer. Rachel a little more so than Kara, but she kept it in check since she was the one driving. There was a guy there, and she assumed it was his party. She only heard anyone refer to him as T, but he was definitely the coolest person in the room. Girls swarmed around him and Rachel, in particular, had been hanging on him for much of the night. Kara, being more insecure, and more sober, had hung back a bit, but was still enjoying the party. That is until the boy, Justin she had learned his name was, started having convulsions. The rest of the story was as she had told Dave, and she reiterated it all for Derek, up until when she showed up at the BAU.

Kara was starting to feel that warmth make its way through her body again, but tried to control it. Of course, like earlier, the more she tried to control it, the worse it got. Derek must have sensed something, as he quickly stood and found a bottle of water in the frig under Dave's desk. He handed it to her and she walked to the window and tried to calm down.

"You did great, Kara. Are you ok to wait here while I go talk to the others?"

"Yes," she said, although she wasn't entirely sure that was true.

"I'll send your mom back as soon as I can."

"Ok," she was glad she was turned from him, because the tears were starting to come again.