Bloody Beach

It's been a year since Annabeth has died from an ambush of monsters and still Percy hunts for her killer. But the trail's gone cold... that is, until he's on his way to Forks Washington where something happens that sparks his curiosity once more. A hidden world lies in the shadows of tall trees, where the animals that prowl in their darkness are more than they seem. (Story is on Fanfiction.com as well, has a different description though)