While enjoying a fabulous party hosted by wealthy Joanna Tate, Nancy finds herself investigating a major jewel theft. Joanna's newest prize--a diamond and ruby necklace--is missing. And since Joanna hasn't kept the necklace a secret, Nancy has plenty of suspects.
Her chief problem is rookie police detective John Ryan, who wants to nab the thief himself. Buta rash of copycat robberies-- and some devishly original murder attempts--convince Nancy to collar the country club burglar right away..or pay dearly later.