On a Greek island during the 1912 war, several people are trapped by quarantine for the plague. If that isn't enough worry, one of the people—a superstitious old peasant—suspects a young woman of being a vampiric demon.
Boris Karloff
as Gen. Nikolas Pherides
Ellen Drew
as Thea
Marc Cramer
as Oliver Davis
Katherine Emery
as Mary St. Aubyn
Helene Thimig
as Madame Kyra
Alan Napier
as St. Aubyn
Jason Robards Sr.
as Albrecht
Ernst Deutsch
as Dr. Drossos
Skelton Knaggs
as Andrew Robbins (uncredited)
Sherry Hall
as Col. Kobestes (uncredited)
Erick Hanson
as Officer (uncredited)
Rose Hobart
as Mary St. Aubyn (in long shot; uncredited)
