A Chinese-American surgeon faces a moral dilemma after operating on the mob boss in charge of vice and protection rackets in her city's Chinatown.

Anna May Wong
as Dr. Mary Ling

Akim Tamiroff
as Frank Baturin

J. Carrol Naish
as The Professor

Sidney Toler
as Dr. Chang Ling

Philip Ahn
as Robert 'Bob' Li

Anthony Quinn
as Mike Gordon

Bernadene Hayes
as Dolly Warren

Roscoe Karns
as Rip Harrigan

Ray Mayer
as Potatoes

Richard Denning
as Jeff, Protective Association Henchman