A scientist working with genetics creates a horrifying flying creature that feeds on human blood. Following a gruesome trail of dead bodies, Scotland Yard investigators must scramble to halt its ravenous rampage.
Detective Inspector Quennell
Dr. Carl Mallinger
Clare Mallinger
Sgt. Allan
Granger the Butler
Meg Quennell
William Warrender
Morgue Attendant
Frederick Britewell
Clem Withers
