Author Algernon Blackwood (1869-1951) casually narrates his uncanny 1937 tale. 'Audible skywriting' and its unintended consequences are the unlikely subject, effectively undercut by a surprise ending. The camera angles are eccentric, but it's a rare opportunity to see Blackwood onscreen.
The shadowing forth of Our Lord Lucifer, as the Power of Darkness gather at a midnight mass. The dance of the Magus widdershins around the Swirling Spiral Force, the solar swastika, until the Bringer of Light—Lucifer—breaks through.
An alcohol/drug abuser re-examines his life until he nearly dies from an overdose. Then a friend convinces him to join a self-help group which turns out to be demonic.
A film director, in bad standing with his studio, tries to turn a local carnival dancer into a "French" movie star and pass her off as his big new discovery.
Jack Garrett interrupts a stagecoach holdup where he meets Fuzzy (The town's stagecoach driver, station agent, baggage agent, and sheriff) and banker Jim Thorn.
Lost Caverns Hotel bellhop Freddie Phillips is suspected of murder. Swami Talpur tries to hypnotize Freddie into confessing, but Freddie is too stupid for the plot to work.
Riders of the Dusk is another of Monogram's formula Whip Wilson westerns. Since the studio couldn't build an entire film around Wilson's bullwhip prowess, a plot was called for.