A group of tourists traveling on a bus take a detour to stay overnight in a castle owned by a family cursed with a history of Satanism and death.
Would you sell your soul for a woman? He did!
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Did You Know?
The film's screenwriter Patrice Rondard, who frequently used the pseudonym Patrice Rhomm for his literary and cinema industry work, also wrote a novelization entitled Au service du Diable. The 216-page French language paperback was published by Galliera in April, 1971 to coincide with the film's European theatrical release. Galliera issued the book as the first volume in their Bibliothèque de l'étrange (Strange Library) series. It features a full color illustration on the paper cover depicting Erika Blanc and Daniel Emilfork as their respective characters that is moderately different from the artwork used for theatrical release poster. See more
Film was released with a "PG rating in 1972, then released in 1974 in an extended "R" rated cut. The "R" rated version contains a longer sex scene between the two women. See more
Remade as The Devil's Nightmare