"Ruthless ruler of a city of Shadows!"
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.
Dr. Mary Ling

Frank Baturin

The Professor

Dr. Chang Ling

Robert 'Bob' Li

Mike Gordon

Dolly Warren

Rip Harrigan

Potatoes
Jeff, Protective Association Henchman

Interne

Bert, Fight Trainer

Detective
1st Gangster
2nd Gangster

Dr. Jones

Chinese Woman
Mr. Foo

Announcer at Fight

Investigator

Barber (uncredited)

Nightclub Girl (uncredited)

Nightclub Girl (uncredited)

Nightclub Patron (uncredited)

Chinese Man (uncredited)

Nightclub Girl (uncredited)
Nightclub Girl (uncredited)

Dancer (uncredited)
Detective (uncredited)
Nightclub Girl (uncredited)
Nightclub Patron (uncredited)
Dancer (uncredited)
Detective (uncredited)

Fight Spectator (uncredited)

Nightclub Girl (uncredited)
Tommy Wu (uncredited)
Chinese Woman (uncredited)

Nightclub Girl (uncredited)
Henchman (uncredited)
Politician (uncredited)

Businessman (uncredited)

Nightclub Woman (uncredited)
Heath, Baturin's Butler (uncredited)
Fight Spectator (uncredited)

Henchman (uncredited)

Slugger Grady (uncredited)
Nightclub Girl (uncredited)

Dist. Atty. Philips (uncredited)

Nightclub Girl (uncredited)
Nightclub Girl (uncredited)
Nightclub Patron (uncredited)
