Amy and Effy Tribble, professional chaperones, are hired to prepare a young women for a society marriage. She has been spurned by a man she loved and wants nothing to do with another match. However, she soon learns she may have made more trouble for herself than she can handle and turns to the Tribbles for assistance.

Lizzie refuses to marry just to regain her ancestral home, which her father had gambled away. The stuffy new owner, the Duke of Severnshire, is not as rude as she orginially thinks and Lizzie is at a loss for words.

Fiona, a beautiful and wealthy Scottish heiress is sent to the Tribble sisters to be prepared for the London society season, after the season's first ball the sister's realize why she left Scotland unmarried.

The notorious house at 67 Clarges Street is reputed to be haunted and thus difficult to rent. When Mrs. Hart and her two daughters rent the house, it is "Plain Jane" who makes the best catch of the season while solving the mystery.