When his import/export business infiltrated by international diamond smugglers, Mr. Moto must follow a trail of clues littered with beautiful women, glittering gems and deadly assassins. Making his way from the mysterious streets of San Francisco's Chinatown to the dark and dangerous alleys of Shanghai, Mr. Moto will stop at nothing to bring the culprits to justice...even if it means making the ultimate sacrifice!
Peter Lorre
as Kentaro Moto
Virginia Field
as Gloria Danton/Tanya Boriv
Thomas Beck
as Robert 'Bob' Hitchings, Jr.
Sig Ruman
as Nicolas Marloff
Murray Kinnell
as Joseph B. Wilkie
John Rogers
as Carson
Lotus Long
as Lela Liu
George Cooper
as Muggs Blake
J. Carrol Naish
as Adram
Frederick Vogeding
as Curio Dealer
William Law
as Shanghai Police Chief
