Pauline, Petrova, and Posy Fossil are sisters - with a difference. All three were adopted as babies by Great Uncle Matthew, an eccentric and rich explorer who then disappeared, leaving them in the care of his niece Sylvia. The girls grow up in comfort until their money begins to run out and nobody can find Great Uncle Matthew. Things look bleak until they hit on an inspired idea: Pauline, Petrova, and Posy will take to the stage. But it's not long before the Fossils learn that being a star isn't as easy as they first thought...