Lady Ellen seeks respite in the charming seaside town of Branden Bay, whilst her home, which was used as a convalescent home for war veterans, is being refurbished to its former glory. Her peaceful break takes a dark turn when she unexpectedly crosses paths with her arch-nemesis, the enigmatic Major Albert Coltrane. Major Coltrane is found lifeless, his face submerged in his own soup after a heated and public confrontation with Ellen who finds herself accused of murder.

Determined to clear her name, she forms an unlikely alliance with Lottie Penny a hotel chamber maid and Captain Ernest Hamilton, a former patient at her convalescent home.

With her faithful Irish setter, Prince, by her side, Lady Ellen embarks on a riveting journey through hidden alley bars and the opulent music hall of Branden Bay. They strive to unravel the threads of the mystery, in race against time to expose the real killer before Lady Ellen becomes the next victim.