Christmas 1923.

It's the first Christmas without Aunt Agatha and Violet is having a hard time finding the will to be bright or young. Her brother, Victor, is determined to cheer her up , so he arranges a party between friends to brighten their holidays.

When a body is discovered, Detective Inspector Jack Wakefield is on hand. Their romance may be a off-kilter, but he knows them well enough to be sure neither twin killed the victim. So just who killed this person and why? In finding the killer, will Jack and Violet also discover just what the future holds for them?