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...
In the year 1780, Harriet Westerman, the willful mistress of a country manor in Sussex, finds a dead man on her grounds with a ring bearing the crest of Thornleigh Hall in his pocket. Not one to be bound by convention or to shy away from adventure, she recruits a reclusive local anatomist named Gabriel Crowther to help her find the murderer, and historical suspense's newest investigative duo is born.