The performances at The Royal Theatre are extraordinary.

You'd have to see them to believe them! But that's the problem. Nobody can see them. Except Gracie, that is. Gracie's new to this seaside town, but she's making friends quickly.

There's Mikey the Mod who wears a parka and drives a scooter, Miss Melluish whose skirt is missing, and Frank Stuart, the builder of elephants.

But the old theatre is under threat. Will Gracie and the residents be able to save their home, or is the curtain set to fall on their very last performance?