Greenvale is a small town located in an unnamed rural area in the middle of the woods. It is the site of a brutal murder

that brings in FBI agent Francis York Morgan. Morgan eventually discovers two important things about Greenvale: several decades ago Greenvale was used in a government experiment involving a drug that made people insane, and the current sheriff runs a tiny S&M cult and forced several of the women in the town to be his sex slaves.