 This is reflected in the film by the bisexual French teacher Suzanne, who attempts to find sexual liberation and recognition for other bisexuals.The film's credits state its story is based on a novella by Peter Bryan.It is unclear whether this was a pseudonym for an author of Italian "giallo" magazines, or the British novelist Peter Bryan who wrote scripts for Hammer such as "The Hound of the Baskervilles" and "Brides of Dracula".