Confronting a prowler in the backyard, Dinah is determined to find out why someone has taken an interest in her older sister and herself. Who is the buck-tooth burglar? Why are the Rinaldi's tomatoes always involved? And what is the connection between Madge's boyfriend and GASP, a group of well-intentioned anti-smoking activists? When it becomes apparent that Wellman Talent, the modeling agency Madge works for, is making deals with an unscrupulous tobacco company, and that the spy is out to sabotage GASP's plans to expose the connection, Dinah has to call on all her talents, both sleuthing and singing, to solve the case.