Quiet, unassuming Meg Thorne is practically invisible. But this retired philosophy professor has plenty of opinions - like, why do people dismiss little old ladies as harmless? Meg and her two friends, the tough-as-nails Dorothy Arden and the boisterous Lila Gatti, have decided to be a Force for Good with their Grey Ghosts Agency: because little old ladies can go undercover where other detectives can't. Their new case is the infiltration...