Charlie's visit to Paris, ostensibly a vacation, is really a mission to investigate a bond-forgery racket. But his agent, apache dancer Nardi is killed before she can tell him much. The case, complicated by a false murder accusation for banker's daughter Yvette, climaxes with a strange journey through the Paris sewers.
Warner Oland
as Charlie Chan
Mary Brian
as Yvette Lamartine
Thomas Beck
as Victor Descartes
Erik Rhodes
as Max Corday
John Miljan
as Albert Dufresne
Murray Kinnell
as Henri Latouche
Minor Watson
as Insp. Renard
John Qualen
as Concierge, Dufresne's Hotel (bit)
Keye Luke
as Lee Chan
Henry Kolker
as Paul Lamartine
Dorothy Appleby
as Nardi
Perry Ivins
as Bedell, Lamartine's secretary
