Jenny McNair Campbell is sometimes reluctant assistant to her father, Charlie McNair, Scotsman, trumpet player, professor, ladies' man, and private detective. Her father involves her in another of his cases. Her world is turned inside out as she spies on members and family members of the divorce attorneys down the hall from her own husband's law firm. When the subject of her investigation, Amy Morrison, drowns in her hot tub, Jenny's father wants her off the case, but she refuses to quit.