nancy wagner ( sandra dee in her last movie role ) be a librarian at the miskatonic univ where the only copy of the necronomicon ( an evil book ) be keep . sinister wilbur whatley ( a young dean stockwell in a hideous mustache and hair do ) use her to get access to the book . he then invite her to his house in arkham . he get her there and drug her to make her stay . he have plan for her . also there something in the attic banging at the locked door . two of nancy friend come to get her and all hell break loose . first off and this be not a faithful adaptation of h. p. lovecraft story ( i should know i just read it a few week ago ) . some scene be take from it but the script be very different from the source . that say it not a bad film . it elaborately do ( beautiful setting and eerie sound and rich deep color ) and be mildly engross . unfortunately it far from perfect . the script be ok but there be far too many plot hole ( for instance and dee tell stockwell she can not stay the weekend . in the very next scene she say she be . ) . also the acting be really bad by the two lead dee seem uneasy and unsure of how to play her part while stockwell ( who be a great actor ) be and surprisingly and terrible . he act like he stone half the time ( maybe he be ) and be just horrible . there be scene of a monster stalk about ( hey and it an aip film . ) and attack which be very psychedelic ( lot of flash light and negative film and different color and loud sound ) and quite effective . look for talia coppola ( later shire ) a one of the victim . however and there no graphic gore or blood . also and a real cool end . also and there an odd somewhat homophobic line in this a friend of dee comment on her stay with stockwell if he be straight and i wouldn not be worry . . be that suppose to be funny . it pretty stupid and offensive today . all in all and an ok film . it be reissue in vhs and dvd in a beautiful new print with great color and sound . try to see it that way it really help the film .