When Anna Marsh returns to her late mother's isolated house to clear it for sale, she discovers an old Polaroid camera that doesn't simply capture images, it summons and feeds a hollow, starving presence that has haunted the women of her family for three generations.
The photographs it takes are a countdown, and with each flash, the entity comes closer to making Anna its permanent home.
To survive, she must unravel the grief that gave it birth and confront the truth her mother and grandmother never could.