Ethel Lina White’s classic psychological thriller.
Four girls have been murdered. As darkness falls, the young maid Helen Capel feels distinctly uneasy, as though she is being watched, as she walks through the woods alone.
News of yet another murder reaches the ears of the inhabitants, but this time close to their isolated family home on the Welsh border. Under the instruction of the Professor Warren, nobody may leave or enter the house that night. Just as the Professor finishes his announcement someone starts to knock loudly at the front door… But is there really safety in numbers? And what happens when their numbers start to dwindle..?