Prologue:
I coughed, hard, and tripped forwards across the ground. Blood dripped down my face and burned my eyes, making it impossible to see where I was going. I was blind; the world around me was red. I stumbled on in the same general direction, led by the call of the water and the hum of magic. Demigods. I knew they were there. I knew it for a fact. They had to be. I could feel their magic leaking into the earth, into the water. I could smell them.
The water was getting closer. I staggered forwards and fell headlong into a roaring river. I struggled along the bank, the energy from the water humming in my blood. I turned and faced the direction from which I had come, and raised my arms. The water roared in my ears, rising up over my head and flooding the far side. I poured water for as long as my legs could hold me, then staggered back onto the bank an collapsed.
The water rinsed some of the blood from my eyes, and through wet red strands of hair I could see a spiraling blue sky above me. A horn was going off repeatedly somewhere in the distance, and I wished – desperately, I wanted nothing more – that it would stop for a moment and let me sleep.
A face appeared over me, with dark hair and feminine features.
"Need," I managed. I rolled over and coughed blood into the sand on the bank. The world reeled around me and tumbled into blackness, and I forced myself to finish the phrase. "Percy. Jackson."
