Ghost hunter Bruce Gibson buys a haunted house and challenges a satanic "dark stranger" to work his worst magic. He conjures a "monster's ghost" out of the bodies of four dead men, a black bull and drops of Gibson's blood. With the help of this powerful demon the dark stranger matches his wits against the ghost hunter's.
Dr. Frederick Hansen and his expedition are trekking through the Gobi desert in search of the tomb of Genghis Khan. When they find it, they discover a Chinese scroll, too. The magic words revive the Khan and his horde. The doctor's daughter, Judith, is to be made the bride of the emperor. But Judith sacrifices herself by destroying the magic scroll.
When Jane encounters her fiance Jim, she believes he's returned from the war in Korea. But Jim has been killed in action, as his parents assure her. The puzzled Jane wants to know the truth and opens Jim's coffin.
A vampire stalks an US-American city. Crime reporter Bill Swaney exposes the businessman Orloff from Transsylvania as the fiend and kills him. But the murders continue; there must be another vampire on the loose.