The Devil Bat

Dr. Paul Carruthers (Bela Lugosi) is frustrated because he thinks his employers, Mary (Suzanne Kaaren) and Henry (Guy Usher), have cheated him out of the company's profits. He gets revenge by altering bats to grow twice their normal size and training them to attack when they smell a perfume of his own making.

Bela Lugosi, a scientist, seeks revenge by breeding a race of Devil Bats to do his sinister bidding!