The amateur sleuths uncover the remains of a racehorse while engaged on horticultural work in the grounds of pop star Nev Connolly's supposedly haunted mansion. Before long, gruesome revelations are coming thick and fast as Nev is shot dead and more bones are discovered - this time belonging to a young woman. As they investigate further, Rosemary and Laura are plunged into a sinister mystery with roots deep in the past.

The duo are hired to cure a patchy lawn at a select language school hiding dark secrets. The disappearance of a Polish student alerts them to a tale of passion, rivalry and revenge, and when a handyman is found with his throat cut they race to find the killer.