Elijah 'Eli' Quinn is a princess of a small kingdom under the sea. Though she doesn't want to be a royal. She wants to follow in her late father's footsteps and go out into the world. More importantly she wants to go the top. A feared place among the Merpeople. She wants to be the first to learn all she can about the world above.
Her mother is most disapproving of her daughter's adventurous streak. She is afraid that her daughter will be killed like her husband.
Eli gets herself a ticket to the top when a rag-tag group of pirates who want as much adventure as she does (and maybe a little more fame).