Dancing with Death

Eliza's life turned upside down while on a field trip with her friends Piper, Leo, and Jason. Everything she thought she knew is called into question and she realizes she doesn't even know who she is.
She's taken to a strange camp full of people who are, supposedly, like her, but something's still off.
People are talking about a great prophecy and seven half-bloods that have to face the unimaginable. Eliza's mind is fuzzy and her past is screwed up, but she knows that she needs to protect Jason.