Dean frowned as he heard thunder rumble. He looked over at Sam, who was sitting with Ellen at the bar. Jo still hadn't come back from when she stormed off hours ago. Dean had made some stupid excuse about not wanting to leave until he knew Jo was safe, and Sam had obliged.

Rain started to pound the roof and Ellen looked up at the ceiling before looking at Dean. Dean sighed and looked at Sam.

"I'll go find her." Ellen shook her head and grabbed her own coat.

"I know Jo. I'll go get her."

Dean shook his head. "Ellen-"

"This is my fault, Dean. Besides you two should get on the road." Ellen left with a slam of the door, making the brothers look at each other.

Dean sighed and dialed Jo's number for the fourth or fifth time. He sighed as the phone continued ringing and began debating to leave a voicemail or not.

"Hello?" Jo frowned, taking Dean by surprise.

"Jo?"

"Yeah?" she asked, clearly agitated.

"Where are you?"

Jo snorted. "Doesn't matter."

Dean sighed. "Yes, it does, Jo."

Jo rolled her eyes. "Shouldn't you two be on the road?"

Dean shook his head. "Jo, we need to talk."

"No, we don't. Now leave me alone, Dean." She hung up and Dean sighed, looking at the phone. Sam got up from the bar stool and walked into the back. Frowning, Dean followed him. Sam knocked on Ash's door and slowly it opened.

"You reach her?" the rocker asked. Sam nodded, taking Dean's phone and handing it to Ash. Ash nodded and took the phone over to his computer before typing frantically. Ash frowned as the GPS pin point appeared on the screen. "She's moving."

Dean frowned. "Moving to where?"

Ash sighed. "Chicago."

"Chicago? What's in Chicago."

Ash looked at the brothers. "A case."

Dean's frown deepened. "What kind of case?"

Ash sighed, and pulled up some Chicago news articles. Strip Club of Death. Third Stripper Found Dean in Alley. Serial Killer on the Loose? Sam looked at his brother.

"Vampire?"

Asho shook his head. "Jo thinks it's something else."

Both brothers frowned. "Like what?"

"A siren."

"But then why would it be killing strippers?" Sam asked.

Ash shrugged. "Maybe to take their place."

"Maybe," Sam frowned, but Dean had already grabbed his duffle from the room he had dumped it in. He looked at Sam and nodded, silently telling his brother to grab his bag. Ash looked at Dean.

"You two gonna be okay?"

Dean nodded. "Just don't tell Ellen."

Ash smirked. "Just keep her safe."

"Will do."