The familes dysfunction is depicted in a disturbing climax. The title depicts the family's metaphorical "skeletons in the closet" in a quite literal way.
Be prepared, this is not your usual drama. If you enjoy the absurd, you've come to the right place.
The play can be read(/performed) as comedy rather than existentialist tragedy, especially since it sputters out rather than achieving catharsis. It seems to me that Harold Pinter's "The Homecoming" is a more effective vision of a similar return "home" to a viper's next and that the third act of "Buried Child" would be better if Shelly established her dominance rather than Vince inheriting the place after Dodge's (perhaps unreliable) confession.