The Daily Clarion hires detective story writer Steve Colt to investigate the deaths of a group of scientists working on an atomic rocket development project. Behind the killings is fortune teller Sombra, a spy from an Asian country intent on world domination, who is determined to pilfer the atomic rocket by luring workers from the project to her parlor and killing them with black widow spider venom when they refuse to cooperate.
Bruce Edwards
Steve Colt
Virginia Lee
Joyce Winters (as Virginia Lindley)
Carol Forman
Sombra, The Black Widow
Anthony Warde
Nick Ward
Ramsay Ames
Ruth Dayton
I. Stanford Jolley
Dr. Z.V. Jaffa
Dave Anderson
Porter-Spy
Theodore Gottlieb
Hitomu
