Brillant scientist and family man Matt Winslow finally accepts the invitation to work the Micro-Digitech Corporation in a space suit project, so he moves with his wife Patricia, their son Robbie, and daughter Chrissy.
There, they meet a new friend named Tom Peterson and his family, who invites the Winslow family to join the Steaming Springs Country Club, but Matt turns him down.
Matt is introduced to the director of the club, the seductive and beautiful but evil Jessica Jones, who befriends Patricia and convinces her to join the club with her children.
Matt is immediately suspicious about their behavior and begins to investigate. He soon learns that many people who have joined the club have died of suspicious deaths or have advanced in their careers.
He realizes that the club is a portal to hell, and now he is fighting to save himself and his family from becoming the next victims.