The Phantom Rider helps Mary Grayson thwart a plot to steal her land.

Small-town girl Mary Barry wins a beauty contest and goes to New York to meet D. V. Cortelyou, the magazine's publisher. Greatly taken by young girl, Cortelyou arranges for her to live with Dolly Griffith, a woman of questionable reputation who often aids him in his wicked schemes of blackmail and seduction. During a party seemingly in Mary's honor, Cortelyou obtains some apparently compromising evidence with which to blackmail Mrs. Young, the wife of a wealthy broker; Cortelyou then makes rough advances toward Mary, and one of his assistants, Jack McGuire, gives him a good beating.

A G-man woos a newswoman and corners bank robbers with a hostage in a factory.

Nightclub owner Steve Larwitt sees his empire of investments collapse as he faces tax evasion charges and attacks by rivals. Believing Steve will be safer in prison for one year, his wife, Brenda, testifies against him on advice from his lawyer, Slant Kolma, who is in love with her. After Steve receives 10 years in Alcatraz, Brenda moves to be near him and avoids advances of airplane builder Tim Nolan, who knows nothing about her past.

A charlatan posing as Baron Munchhausen is invited to be guest speaker at a girls' school.

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.

In order to avoid a prearranged marriage, a rebellious French princess sheds her identity and escapes to colonial New Orleans, where she finds an unlikely true love.

When the painter Christopher Bean dies, some unscrupulous art dealers try to get several of his paintings cheaply from a family who have no idea of their value.

John Power is a hard-nosed financier who has neglected his domestic life and who tries to ruin the Wray family. But a revelation concerning a Wray family member sends Power into a climactic delirium in which he believes he is being judged by people in his life.

Linda, the wife of a publishing executive, suspects that her husband Van’s relationship with his attractive secretary Whitey is more than professional.