Lea is daughter of the queen of an underwater community. When danger strikes she is sent to live with her cousin but before she leaves she had to be told her people's biggest secret. She can never tell anyone in her community and she can't tell anyone she meets where she is from. Danger seems to follow her and she finds herself in a situation she never imagined. Most of all she has to face the fact that Terrans (people who live on land) really exist.