Taking the waters has never been more delicious–or dangerous…

When a mysterious invitation for a spa holiday arrives for Miss Phryne Fisher from an unknown retired Captain Herbert Spencer, Phryne’s curiosity is piqued. Spencer runs a retreat in Victoria’s rural spa country for shell-shocked veterans of World War I. It’s a cause after Phryne’s own heart, but what can Spencer want from her?

Phryne and her faithful servant Dot set out for Daylesford, viewing their rural sojourn as a short holiday. While Dot gets to know the remarkable women who run the hotel where they are lodging, Phryne enjoys an enticing meal–and dessert–with the attractive Captain Spencer. But their relaxation is short-lived as they are thrown into treacherous Highland gatherings, a mysterious case of disappearing women, and a string of murders committed under their very noses. Meanwhile, back at home, Phryne’s three wards are busy solving a mystery of their own when a schoolmate is found floating facedown near the docks–and pregnant at the time of her death.

With her usual pluck and deft thinking, Phryne methodically investigates the strange goings-on in this anything-but-tranquil spa town.