The Monahan family abandons Chicago to settle into a private mountain community, The Gates, where father Nick becomes the new police chief. But the picturesque neighbourhood is not idyllic as it seems, as a dark secret is buried just beneath the surface. Nick becomes entangled in a mystery in which he starts to piece together the dark truth about his family's new home. Nick's wife and two teenaged children face challenges of their own as they adjust to their new lives in The Gates.