True-crime author, Carly, and her husband Kevin take a vacation at a historical mansion on Crawford Island. Kevin thinks it will be a chance for them to reconnect, but Carly plans to research the puzzling unsolved murder of Diana Crawford.
When an old friend of New York Sentinel Crosswords editor Tess Harper is found murdered on the very day her puzzle includes his proposal of marriage, Tess unofficially teams up with Detective Logan O’Connor to find the killer.