After her father loses his job and her mother is laid off, seventeen-year-old Sarah moves with her family into the only asset they have left: a decrepit cabin in the deep woods, left to them by a great-grandfather she never knew. On their first night, a shadow crosses the road in front of their car—too fast, too low, the wrong shape for any animal. By the second night, the cabin is breathing. By the third, Sarah's parents start smiling wrong. Something lives in the woods. Something that has been waiting. Something that knows her name and wants what she carries inside her—a seed of faith she didn't know she had, in a God she stopped believing in years ago. Sarah has three days to find the truth hidden in her great-grandfather's patch. Three days to learn what the lake water hides. Three days to speak a name that the darkness cannot refuse. But the thing in the cabin has been here longer than she's been alive. And it has already taken her parents. It's just wearing their faces now.