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.
Devil's Nightmare will leave its Mark on you!
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Did You Know?
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