When a young demigod is taken to Camp Half-Blood, the only safe place for demigods, Claret finds out who her parent is. She is shocked at the fact that her dad is a god. But soon realized that being a half blood isn't all fun and games. When one of the campers are kidnapped, she must go, find him and bring him back. Claret doesn't want to because she is not experienced enough. But she has a power that is rare and powerful. But only if she can figure out how to control it.

The Mermaid kingdoms are in a war with the Captors. Horrible villains that wish to take and control the Mermaid lands. 14 year old Delilah is a regular human- or so she thought. She's actually a mermaid with a curse. She's forced to live on land and as Delilah gets older she starts to get the power of controlling water, and turning into a mermaid. But the Captors are after her, wanting to catch her and use her as a asset in the War.