Isadora has been invited to a sleepover under the sea with her mermaid friends, it's so exciting! But when she arrives she meets a mermaid called Emerald, who doesn't seem quite so pleased to be there. Can Isadora find out what is the matter? It's the beginning of a magical underwater adventure!

Isadora has been invited to a sleepover under the sea with her mermaid friends, it's so exciting! But when she arrives she meets a mermaid called Emerald, who doesn't seem quite so pleased to be there. Can Isadora find out what is the matter? It's the beginning of a magical underwater adventure!