In 1930s England, Jessie Harper finds herself caught up in the latest case of the Dale Street Private Investigations Agency. Along with her partner George Jenkins, and Khan, the talking cat with magical powers, she sets off to London to solve the mystery of the kidnapped pedigree cats and the wealthy socialites who have received ransom demands for their beloved pets.

But this case is unlike any they've faced before. Khan has gone undercover to gather information. Detective Sergeant Bill Roberts, Jessie’s mentor, is seconded from the Liverpool City Police to lead the investigation in London.

As they delve deeper into the case, they discover a web of deceit and danger that threatens to unravel everything they know. The stakes are high as they race against time to find the missing cats before it's too late. The team quickly finds itself in over their heads as it navigates the dangerous streets of Clerkenwell, London. But with Khan's help and Detective Sergeant Roberts' expertise, the team starts to piece together the clues that will lead to the kidnappers.

With its blend of paranormal intrigue, cozy mystery elements, much Khan humour, and romantic tension between Jessie and George, this fourth instalment in the Jessie Harper series is sure to captivate listeners until the very end.