A newly formed all-women private investigator firm is thrust into a high-profile murder case, putting them in direct competition with the police, including the PI firm leader's husband. Newly minted PI Emma Holmes and her partner Sam Collins are hired by retired music-hall star Verity Malone to investigate the poisoning of her husband, a theater impresario, a crime for which Verity herself stands accused. The Brighton police, led by Emma's husband, Superintendent Edgar Stephens, are also on the case, creating a tense rivalry. As Emma delves deeper, she uncovers connections between Verity's past and her own, particularly through Max Mephisto, who has returned to England with his famous Hollywood wife, Lydia Lamont. The investigation points towards a killer targeting the old music-hall community, raising questions about Max's involvement.

The premise sets up a classic mystery with a modern twist, featuring a strong female lead and a competitive investigation. The inclusion of historical elements related to the music hall and the entanglement of personal relationships with the case suggest a narrative rich in atmosphere and intrigue. The interplay between the private investigators and the official police force, particularly the marital dynamic, promises complex character interactions and escalating suspense. The author's established skill in crafting compelling mysteries indicates a well-plotted story with satisfying reveals.