In 1910 Manhattan, Victoria Van Brett, a bitter spinster heiress lives an isolated life with her sister Caroline. Her domineering urges go into overdrive when their half-brother Rip brings a new bride home to the family’s gloomy Fifth Avenue mansion, built by their late industrialist father. The title refers to a secret soundproofed chamber that the villainess uses to entrap her enemies.

Evelyn Venable
as Anne Darrow

Mary Morris
as Victoria Van Brett

Anne Revere
as Caroline Van Brett

Kent Taylor
as Rip Van Brett

Guy Standing
as Mortimer Neff

Colin Tapley
as Dr. John Lucas

Virginia Howell
as Avery

Halliwell Hobbes
as Mr. Chase

Frank Dawson
as Telson

Helen Shipman
as Louise
dennyjt
“The play that made Broadway Gasp!” This is a gripping melodrama, anchored by a fearsome performance by Morris as a controlling, maniacal mother to Taylor, determined to sabotage his marriage to winsome Venable. It was to be her only film appearance, although she had a fruitful stage career. Her sim...