When Sylvia and her old nurse Nana agree to keep house for Gum, they know they will be looking after his fossil collection while his away on his travels. But imagine their surprise when one day he brings them something else - three baby girls whose names all being with 'P'! Pauline, Petrova and Posy Fossil are not really sisters - even their surname is invented. The girls decide to 'put our name in the history books because it's our very own', and...