Aveny's family is dead. After the giant war, a group of rogue monsters attacked Camp Half Blood and Camp Jupiter, leaving behind devastation, and only 1 demigod left in camp. After surviving two wars, quests with Percy Jackson and friends, 6 years of abuse from her 'father', she is finally broken.
Everyone is dead, and she has nothing left to live for.
Then, she gets approached by a few people, who need her to go to Forks, and live with her Uncle Charlie. Her job is to discover what lives there, are they a threat, and what has happened in two years to her cousin, Isabella Swan.
Disclaimer; I am not Stephanie Meyer or Rick Riordan, and I do not own Twilight or Percy Jackson. If I did, I would probably be writing a Harry Potter or Kingdom Keepers fan fiction right now.