Jerry Campbell just wants to be left alone. Grief-stricken over the death of his wife Abigail, the elderly widower and recent retiree is desperate for a change of scenery. When his realtor suggests a new home in Fairview Acres, a retirement community in the Poconos, Jerry figures it will be a nice place to spend the rest of his days in solitude. Until he moves in. Weird neighbors. Nightly block parties. Strange noises across his rooftop at all hours. Worst of all is Arthur Peterson, chairman of the Fairview Acres Community Association, who seems obsessed with coaxing Jerry into participating in these neighborhood activities. At first, Jerry shrugs off the incidents and eccentricities, telling himself he doesn't want to be the guy who complains about everything -- but that all changes one evening when Katherine Dunnally appears on his doorstep with an ominous warning: “You need to leave. The worms...they dance at nightfall....” His neighbors all say Katherine suffers from a form of dementia called Sundowner's Syndrome, but as the weeks progress and the strangeness mounts, Jerry begins to suspect there is something else going on in his neighborhood. Something that has to do with the huge stone in the community park.