How far would you go to save your child? A nail-biting thriller, 'perfect reading for a dark winter's night' (Richard and Judy).

Cass's husband is missing, presumed dead in Afghanistan. Floored by grief, Cass is left alone to take care of her son, Ben, who has been traumatised by his father's death.

So when a renovated mill becomes available in the remote Lancashire village of Darnshaw, Cass decides it will be the perfect place for her family to heal.

But it quickly becomes clear that outsiders are not welcome in the village, and Ben is displaying a hostility Cass can't understand. As darker events unfold, Cass starts to question her son's sanity. Then a blizzard blows in and Darnshaw is marooned in a sea of snow.

Threatened on all sides, Cass finds herself pitted against forces she can barely comprehend.

A broken family. A dark secret. The cold season has begun . . .