The ‘Burbs (1989)
This story takes place in a typical American neighborhood when some new neighbors live in the house next to Ray Peterson. These new people are extraordinary; nobody has ever seen them, their house is a real mess, and during the night, you can hear weird noises from their basement. The only thing they know is their name: Klopeks. One day Walter (an older man of the neighborhood) suddenly disappears, and everyone starts to suspect the Klopeks.