Ray Peterson is a suburban homeowner who's looking forward to a peaceful vacation at home. However, his plans take an unexpected turn when he becomes suspicious of his reclusive new neighbors, the Klopeks. Encouraged by his eccentric friends, art-loving Mark Rumsfield and conspiracy theorist Art Weingartner, Ray starts to believe that the Klopeks are hiding something sinister. A string of strange occurrences and ominous noises from their house only deepens their paranoia, leading them to take increasingly odd measures to uncover the truth.

Their antics escalate as they spy on the Klopeks, dig through their garbage, and ultimately decide to investigate the house while the Klopeks are away. Ray's wife, Carol, disapproves of his growing obsession and urges him to simply ask the new neighbors about their activities. Despite Carol’s protests, Ray and his friends continue their amateur sleuthing, creating a series of comedic and chaotic scenarios that disrupt the tranquility of their once quiet cul-de-sac.