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.

Rosemary and Laura are employed to restore a country churchyard in time for a medieval fair, but it is not long before a local landowner is killed by an arrow beneath an ancient yew in the centre of the graveyard. The duo investigate the possibility that rival bidders for the victim's highly desirable farm are to blame - though affairs of the heart might offer a more likely motive.