Set during 3x18

Allison felt odd in the hospital lobby, she drifted into the lift and found her way to Stiles's room; he was in a blue gown and was sat alone on the bed. He was getting ready for his MRI scan; she had to wish him good luck before she went back to Isaac to investigate the strange phone calls. She knocked on the door and stood there for a while, she felt her hands shake as he turned around to face her. His face was pale, he was still recovering from the cold temperatures he had suffered; it took him a long time to realise who it was as he was tired; the smile he wore when he registered her face was one of the best sights Allison had seen in a while. "I'm so sorry; I never turn my phone off." She promised herself she wouldn't cry, but tears formed as she stepped forward, "Please say you forgive me."

"Well..." He trailed off as he watched her face fall, "Of course I do." He rose from the spot and she brought him into a tight squeeze. "I could never hate you Allison Argent." He told her, he kissed her cheek and pulled away, "Bad news or good news?"

"Start with the good." Allison said taking a seat; he then sat next to her.

"I don't have hyperthermia; I was cold, but not that cold." Stiles's smile looked strange, like it could break at any minute, "I cried a lot and allowed Melissa to take care of me."

"Good." She said proudly, "Always open you to people who want to help, especially your Mother figure...bad news?"

"The MRI scan I'm about to have, do you know what their looking for?" He asked.

"No, it is bad." Allison said as dread filled the pit of her stomach.

"It's called frontotemporal dementia," Stiles began, the word dementia ripped Allison apart from the inside out, she held onto his hand tightly, "And I'm pretty sure I have it."

"It's what your Mum had, right?" Allison questioned wiping the tears from her eyes, "What she died of..."

"Yeah..." Stiles held it for a while, "Areas of the brain shrinks and there's no cure, I mean if I have it, then all you fought for; all the times you saved me from myself, my head was still winning the fight."

"But there is a cure, Scott is your cure." Allison told him, "He would bite you; all you have to do is ask."

"When I tell him all this later, I know he will suggest that, but I can't Allison – I don't want it, I don't want the burden." Stiles choked, "I can have come this far to fall down again."

"We'll fix this, we always do." Allison laid her head on his shoulder, "This isn't the end, we'll find a way."

"Okay." Stiles cracked, "We'll find a way."

Allison was shocked to the core when she opened her front door; Lydia was stood there with teary eyes and a look of pain across her face. The two stood for a while looking at one another, "He's gone..." Lydia cried, "It took him," she added, she shook on the spot and Allison kept starring at her, "It took Stiles."

"What took Stiles?" She asked.

"It possessed him." Lydia looked at her, "I don't know what it is, but it took him; we lost Stiles."

"We can get him back, don't lose faith in him." Allison said as her throat cracked, "Believe in him."

"How?" Lydia asked, "I can feel Stiles, he's lost and confused; he's dying, how do we save him?"

"We find a way; he promised me we would find a way." Allison cried, "We have to - - we have to save him."

Allison's last words to him were 'we'll find a way,' and now she needed to find that way. Sooner rather than later.