The Falcon is about to depart the city to marry his fiancée, Helen Reed, when the mysterious Rita Mara asks for his aid in disposing of a secret formula for making synthetic diamonds. He deliberately allows himself to be kidnapped by the gang for which Rita works. His aide, 'Goldy' Locke, trails the kidnappers and brings the police. But the head of the gang escapes, and the Falcon continues the pursuit.

George Sandersas Gay Lawrence / The Falcon
Wendy Barrieas Helen Reed
James Gleasonas Inspector Michael 'Mike' O'Hara
Allen Jenkinsas Jonathan 'Goldy' Locke
Mona Marisas Rita Mara
Fred Aldrichas Spectator at Airport (uncredited)
Bobby Barberas Spectator (uncredited)
Roxanne Barkleyas Jill (uncredited)
Eddie Bordenas Second Taxi Driver (uncredited)