Against her will and better judgment, the elegant Lady Darriby-Jones sets off with her loyal household to the picturesque coast of Devon. Her destination? The charming estate of her dear friends, the identical Barrington-Webb triplet sisters. Renowned for their flourishing military supply firm, inherited from their late father, the Barrington-Webb sisters have always been the darlings of Devonshire society.

However, their idyllic reunion takes a sinister turn when the firm's manager is found dead under suspicious circumstances. The situation escalates when the triplets themselves vanish without a trace. With the air thick with mystery and danger, Lady Darriby-Jones steps up to unravel the enigma that threatens the privileged but clueless sisters. Her investigation is hampered by the bumbling DCI Rude Manners, whose ineptitude seems boundless. Suspects abound: an American rival with unknown motives, local villagers with secrets of their own, and even relatives who might wish harm upon the triplets.

As Lady Darriby-Jones delves deeper into the murky waters of deceit and danger, she realizes that time is running out. Will she uncover the truth behind the manager's death and the triplets' disappearance before it's too late? Or will she, too, fall prey to a sinister plot?