Nightmare of a death in the dark

It is a dark Sunday night a few weeks before Christmas last year. In the quiet Johnsonville house a mother and father have just gone to bed and their two sons are asleep in a small bedroom down the hall. Suddenly the peace is shattered; one of the boys is screaming. The father leaps up. Naked, he runs to the children's bedroom. Standing over the beds is a man, in dark clothing, with a mask over his face holding a hunting knife.