Unhappily married woman is in love with private secretary. They secretly express mutual affection, hold hands, but never are seen being more intimate.

A group of party-goers play-act a murder scene with a gun that is supposedly filled with blanks. A few moments later they learn that the man playing the victim really has been shot and killed. We see no blood, and the movie avoids anything horrific beyond the fact of the murder itself.

A woman is murdered off-screen. We see the dead body, but the camera does not linger on it or even show its face.

A man is bludgeoned once and knocked senseless, but the camera avoids giving us the full impact of the blow.

The hero, Mr. Wong, is a Chinese character played by a white man.

Some of the Chinese characters speak pidgin English.

A policeman makes an anti-Chinese sentiment, but this is gently rebuffed by Mr. Wong.

Mr. Wong fills his room with cigarette smoke and later tells a policeman that he had been smoking a great deal.

The romantic lead and another man smoke. Mr. Wong borrows cigarettes from both. Poisoned cigarettes involve an important part of the plot.

We see figures lurking in the shadows. A murder takes place on screen, another off-screen. A figure in the dark shoots at the hero with a silenced gun and misses. A figure bludgeons a man once over the head.