When a hotelier attempts to fill the chronic vacancies at his castle by launching an advertising campaign that falsely portrays the property as haunted, two actual ghosts show up and end up falling for two guests.
Bill Whitney is worried that he is different to his sister and parents. They mix with other upper-class people while Bill is more down to earth. Even his girlfriend seems a bit odd. All is revealed when Bill returns home to find a party in full swing.
While holding a séance for skeptical novelist Charles Condomine, self-proclaimed 'spiritualist medium' Madame Arcati inadvertently summons the spirit of his deceased first wife Elvira, leading to an increasingly complex love triangle with Ruth, his current wife of five years.