Eccentric artist and indomitable amateur sleuth Primrose Oughterard is back in Lewes after her 'Baden-Baden' sojourn, but finds tragedy on her doorstep once again with the news that Elspeth Travers has drowned at sea while bathing at Birling Gap. The unfortunate Mrs Travers met her chilly demise in a black ruched swimming costume and pink floral cap, but Primrose is sure something is afoot. Elspeth hated swimming, and indeed frothy swimming hats - why was she in the water, and was her death really a tragic accident? With so much incompetence around, Primrose feels compelled to investigate, and soon uncovers secrets, betrayal and nefarious deeds - with the help of her newly acquired pets, Maurice and Bouncer, inherited from her late brother, Francis. But just when Primrose thinks she's solved the mystery, there's an incredible twist.