Frostbite: A Percy Jackson FanFic

You've all heard of Percy Jackson, twice saviour of Olympus, son of Poseidon, Lord of blue food, etc, etc, but this story isn't just about him. This story is about how his and those who are at Camp Half Blood's destinies intertwine with Astraea Xenia, a 17 year old unclaimed demigod, who turned up at the camp boundaries, with no idea how she got there. Meanwhile, a new enemy is rising. Enemies become friends, friends become enemies, and nothing is ever what it seems. Is this one enemy that Percy can't beat? Find out in Frostbite!

This is another Chaos story, but, with my own twist. I have read loads of betrayal/Chaos etc stories, but I have never heard of one quite like this. This is my first FanFic, so, please comment with any good/bad points, constructive criticism, but, please, nothing too rude. Also, there is no Percabeth, but this will be explained later on.

Disclaimer: Nothing other than the plot and my characters belong to me - everything else is Rick Riordan's. All rights go to him.
As I said, this probably won't be the best story you've ever read, but I hope you enjoy reading!
P.S. There may be a bit of Dark Percy, it really depends on the way that the story goes.