A domineering money-bags' suppressed incestuous urges go into overdrive when her half-brother brings a new bride home to the family’s gloomy Fifth Avenue mansion. The title refers to a secret soundproofed chamber that the villainess uses to entrap her enemies.
Anne Darrow
Victoria Van Brett
Caroline Van Brett
Rip Van Brett
Mortimer Neff
Dr. John Lucas
Avery
Mr. Chase
Telson
Louise
William