A snowbound country manor, just before Christmas in the 1950s. When the man of the house is found murdered in bed, with a knife in his back, suspicion falls on the six women who live under his roof, along with his sister and a visiting daughter. Cut off from the outside world, the victim’s wife, mother-in-law, sister-in-law, and daughter, along with the cook and the housemaid, try to figure out who the killer is. It turns out that each one of them had not only a motive, but also an opportunity for murder …