Hip young New York couple Jennifer and Paul Montgomery love to play games. Wealthy heiress Jennifer inherited their New York brownstone from her mother. Paul likes to spend her money indulging in his interest of modern art. They hold frequent parties and play their games. Into their lives comes door-to-door sales-rep Lisa Schindler. They decide to play one of their practical jokes on grocery-deliveryman Norman: a supposedly-jealous Paul accuses him of making advances to Jennifer. He He shoots him twice--with blanks--and everyone has a laugh, but the third shot kills him. In the days following his death, Jennifer begins to hear noises in the house and seeing shadowy figures at the end of dark hallways. Is it all a game?