A young girl goes to work as a live-in caretaker for a spooky old woman. She doesn't know that every night, the woman drains some blood from her to feed her strange plant.

Gale Sondergaard
as Zenobia Dollard

Brenda Joyce
as Jean Kingsley

Kirby Grant
as Hal Wentley

Rondo Hatton
as Mario

Hobart Cavanaugh
as Bill Stapleton

Milburn Stone
as Mr. Moore

Tom Daly
as Sam Julian

Norman Leavitt
as Tom

Ruth Robinson
as Mrs. Wentley (scenes deleted or never filmed)

Adda Gleason
as Martha (scenes deleted or never filmed)