When Turtle's mother finds a job as a live-in housekeeper in New Jersey she accepts it even though they don't allow children. It is 1935 and jobs are very difficult to find. Turtle is sent to live with her aunt and uncontrollable boy cousins in Key West. Everything is very different here. No one wears shoes and scorpions are common. She meets a long lost grandmother and possibly her true father. A treasure map hidden in an old piano leads her and the boys on a nearly deadly adventure as a storm rips the island they are stranded on. Just as soon as Turtle thinks all her dreams have come true, they're crushed by a man that she and her mother trusted.