Grace and James Gilmour move their family from the city to the small town of Averley expecting a better quality of life. Initially it seems they have achieved their dream, but something nasty is in the wind. Uexplained outbreaks of violence begin to occur in Averley and the Gilmours find themselves falling afoul of the local bully. The people around them begin to act in stranger and stranger ways and eventually the family becomes embroiled in a night of terror that culminates in a fight for their very survival.