Kronos

When a young girl in the village of Durward is found emaciated, drained of all youth, Dr Marcus summons former comrade-in-arms Captain Kronos, who arrives with hunchbacked assistant Professor Grost in tow. Cast out from her clan for dancing on a Sunday, gypsy Carla has hitched a ride with the pair, whom she discovers to be vampire hunters.

Vampires exist in many forms, and a spate of attacks indicates that Durward is cursed by such a presence. Marcus, meanwhile, has cause to suspect that the rich Durward family are involved. At their grand estate, he questions heirs Paul and Sara. Their bed-bound mother blames Marcus for the death of her husband Lord Hagen, a plague victim. The doctor is later assaulted by the mystery vampire.

Upon his instructions, Kronos and Grost experiment on Marcus to find the one method that will negate this particular vampiric strain. Successful, his friend destroyed, Kronos devises a plan to expose the fiend -- by using Carla, now his lover, as bait...