Camp half-blood

You are a half-blood at least- your parental figure told you that after a hellhound attacked you, your currently trying to find a way out of a forest, still being chased by said hellhound trying to make it to a place called camp half-blood. If you can make it there you find that another half-blood appears a week after you. Which later turns out to be Percy Jackson, (this is my way of saying this starts in the first book, have fun and do whatever you want!)