The sixth title in the Not Quite a Mermaidseries - an underwater world of magic and adventure! Electra really wants to go and explore the shipwreck near Mermaid Island. She thinks she might find objects that would help her discover things about the human world she came from. But Maris, her adopted mermaid Mum, won't let her go as it's too dangerous. But Electra won't let that stop her . . .