During a CBI benefit sponsored by the Doverton jewelry firm where Jane performs successfully, Carl Ward, husband of owner Esther, catches but is shot into hospital by a diamond robber. Jane suspects an inside job. Ex-con Doyle Murphy is found shot in his apartment, last visited by ex-brother-in-law Donny Culpepper, whom he owed money. The team also finds links with Ester's nephews Tom and George Doverton. Jane sets the trap.