sentences:  The whole action of the novel takes place on Boxing Day when, early in the morning, Gentry is found murdered in the attic.Snowed in and unable to call the police, the party decide to ask their neighbour, a retired Chief Inspector with Scotland Yard, for help.The latter agrees but finds a rival sleuth in Evadne Mount, one of the house guests and a celebrated author of whodunits in her own right.