A strange girl washes up on shore of Camp Half-blood. No one knows who she is or who her godly parent is, but as theories are disproven and new details come to light. The campers must turn to old friends in search of answers. But, when it comes to half-bloods, things are never that simple.

Ali returns to camp after spending a few weeks with the Romans at Camp Jupiter. In a sudden turn of events, one of the half-bloods that arrived on the Argo II fired on New Rome, committing an act of war. Now, after promising Percy she'd protect Half-blood Hill, Ali must rally the campers against the Roman Legion, which is sure to come and prepare for a war no one wanted or expected. Will her fellow campers listen to her? Or will they ignore her warnings and fall to the Roman forces?

In the aftermath of the battle against Otis and Ephialtes, Eliza is injured and reveals her true nature. Now, as they race to help Annabeth, she must come to grips with who she is and find a way to help the others... no matter what it takes.

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.

Kidnapped. After a startling discovery, Ali has been taken captive by Luke and his army. Kronos has almost attained enough power to rise, but he needs one more half-blood to swear fealty to him. A single soul must pledge their lives to the Titan Lord and he will rise. Luke seems to think that Ali will be that final hero. But what will he do when he realizes that her resolve is stronger than he anticipated?

It's been a year. Mason is still in a coma and his survival is uncertain. While looking for a cure, Ali is roped back into a prophecy that she received last summer. She doesn't know who is haunting her dreams, but she does know how to find out. The camp is in chaos. While the others fight off monsters and try to restore Thalia's tree, Ali goes off on her own to finally finish the prophecy that started a year ago.

Aliana was basically raised at Camp Half-Blood. She has few memories of her life at home, but those she has retained are not pleasant. It's been 7 years, she's 14, and her godly parent, her mother, still hasn't claimed her. Refusing to give into her grief, bitterness, and anger, she throws herself completely into her training. She grows to be one of the fiercest warriors at Half-Blood Hill. You would think everyone would be clambering to have her as an ally, but they weren't. The other campers seemed to hate her. They avoided her like the plague. No one wanted to be associated with her. They didn't interact with her unless they had to. That is, until Percy Jackson arrived.