When evil descends like fog on a mountain community, no one feels safe. After hearing about a string of murders in a Smoky Mountain town, journalist Harper Jennings realizes a startling truth. She knows who may be responsible-the same person who tried to kill her three years ago. Now Harper must convince the cops to believe her before the killer strikes again. Sheriff Luke Wilder returned to his hometown, determined to keep the promise he made to his dying father. The sleepy tourist area with a tragic past hadn't seen a murder in decades-until now. Keeping the community safe seems impossible as darkness edges closer, threatening to consume everything in its path. As The Watcher grows desperate, Harper and Luke must work together in order to defeat him. But the peril around them escalates, making it clear the killer will stop at nothing to get what he wants.