When Grace's husband, Adam, inherits a cottage on the isolated North Yorkshire moors, they leave London behind to try a new life. However, a week later, Adam vanishes, leaving their baby daughter on the doorstep. The following year, Grace returns to the tiny village of Roseby. She is desperate for answers, but it seems the slumbering village is unwilling to give up its secrets.As Grace learns more about the locals and the area's superstitions and folklore, strange dreams begin to trouble her. Are the villagers hiding something, or is she becoming increasingly paranoid? Only as snowfall threatens to cut them off from the rest of the world does Grace begin to understand how close the threat lies, and that she and her daughter may be in terrible danger if she cannot get them away in time.