After their carriage breaks down and their driver is killed in a freak accident, a group of young women are forced to spend the night in a strange and isolated former sanatorium, which has just been purchased by the secretive Dr. Marlow (Paul Naschy). Unbeknownst to the visitors, Dr. Marlow is actually Count Dracula, and stalking the sanatorium are his recently turned vampire slaves Soon the guests begin to be attacked by the ravenous bloodsuckers, while Dracula sets his sights on the beautiful virgin Karen, deciding to offer her his hand in marriage