I was standing at the window, looking out over New York, when the air shimmered and Annabeth's face appeared.

"Hi sweetie," I said, smiling at my son's girlfriend. "What's going on?"

Annabeth looked worried. Her brow was furrowed, and she had bags under her eyes. "Hey, Ms. Jackson. Is Percy there with you?"

I frowned, then shook my head. Why would she be asking that? Percy had been at camp for the majority of the summer, and wasn't returning home for another 2 weeks. "No, Annabeth, why would he be here? He's been at camp."

"That's just it! He's gone! No one can find him anywhere!" Tears gathered in Annabeth's eyes. "He was here last night, and... now he's just gone! No trace of him!" Annabeth bit her lip to keep from sobbing.

I froze. "Oh no..." I pressed a hand to my mouth. How could he disappear? Was it Kronos? Was it someone, something worse?

"Please, Ms. Jackson, any idea where he might be?"

I shook my head. "I'll meet you at camp, and we'll take a drive around to his favourite places."

I waved a hand through the mist and whirled around, running to the door. I grabbed my jacket and sprinted outside.