Madame Ruby, gypsy fortune teller in the city of Chicago, makes headlines in the Chicago Tribune when she predicts a Halloween murder in the old haunted house in Lincoln Park. She also lays down a challenge for Madeline Donovan to attend a séance on that night and thwart the murderer.
Madeline dismisses the challenge until she receives a note from the sisters who live there asking for her help to rid the house of a troublesome ghost who recently inhabited their home and is causing them much consternation.
The scene is then set for her and her friends to attend an elaborate Halloween gala that is nothing as she imagined and begins her journey to catch a ghost.