Far out in the ocean live the Shell-Keeper mermaids. While the rest of the world sleeps, one little girl joins them for some magical mermaid adventures. Molly loves helping the Shell-Keeper mermaids, until a grumpy sea urchin makes his home on her friend Delphi's enchanted shell. He'll only exchange the shell for some sparkly pirate treasure, and riches lie in a nearby shipwreck but what other dangers are lurking there?
