Wisecracking reporter Carl Kolchak investigates a string of gruesome murders in Las Vegas. It seems that each victim has been bitten in the neck and drained of all their blood. Kolchak is sure that it is a vampire. He’s hot on the trail, but nobody believes him. His editor thinks he’s nuts and the police think he’s a hindrance in the investigation, so Kolchak takes matters into his own hand.

A strange series of solar flares proves fatal for inhabitants of the Earth, except for the fortunate few who are somehow immune from the effects. Animals go insane and human beings turn to white powder, leaving behind only empty clothing. A handful of survivors attempt to rebuild their lives on the de-populated Earth.

A young coed (Nan Barlow) uses her winter vacation to research a paper on witchcraft in New England. Her professor recommends that she spend her time in a small village called Whitewood. He originally cam from that village so he also recommends she stay at the “Raven’s Inn,” run by a Mrs. Newlis. She gets to the village and notices some weird happenings, but things begin to happen in earnest when she finds herself “marked” for sacrifice by the undead coven of witches. It seems that the innkeeper is actually the undead spirit of Elizabeth Selwyn, and the “guests” at the inn are the other witches who have come to celebrate the sacrifice on Candalmas Eve. As one of them said when Nan walked away, “HE will be PLEASED.”