Sherry with the bishop

Gwen Cunningham, collector of human failings and gossipmonger nonpareil, drops dead at an elegant party given in honor of the visiting bishop. No one will grieve. It doesn't take long for Detectives Dawson and Eggleton to learn the cause of her death and, more importantly, that all the guests at the party have touch the murder weapon: a bottle of nicotine concentrate--used by gardeners for pest eradication.