Paul Landres directed this horror tale that stars John Beal as small town Doctor Paul Beecher, who is called to the home of a dying scientist who had been experimenting with the blood of vampire bats to make a new serum for his research, that he distilled in pill form. Paul takes a bottle of the pills from his pocket, and after he makes his report, forgets about them. Later, when he has a headache, he asks his young daughter to retrieve his aspirin from his pocket, but sadly takes the bat pills instead, which have the unfortunate effect of turning him into a vampire who must kill. Paul tries desperately to understand what happened, as the police close in... Good performance by Beal, some originality, and a most tragic portrayal of a reluctant vampire, though marred by a much-too abrupt ending that is most unsatisfying.