Jack and Liz are struggling to keep their family together. While the big city trembles under the terror of a serial killer, Jack and Liz have just moved to the small summering community of Hemlock Lake hoping it will make a difference in their relationship. Unfortunately Hemlock Lake is not the quiet town they were hoping for. As the sun sets on the quiet rural lakeside town, Jack, Liz, and their little girl Angie become prey to a mysterious local intent on ripping them apart.