When Bess and George help Nancy pick out a dress for Deirdre's big party, little do they suspect it's the identical dress Deirdre will be wearing! After a minor altercation with the perturbed hostess, Nancy leaves the party only to be grabbed by a dark figure, tossed into a van and kidnapped! That leaves Bess and George, with some help from Ned, to try and solve the mystery of exactly what happened to Nancy. Things get complicated further when Bess and George's number one suspect, Deirdre, is kidnapped, too!