Silent Madden and his daughter Molly have left the criminal underworld of San Francisco thanks to the wise teachings of Chang Low, a Confucian master. But the evil Black Mike Sylva is determined to frame Madden to avenge a mistake from the past…

Sergeant Blake of the Northwest Mounted Police is sent to the border to break up a ring of smugglers who are bringing illegal Chinese immigrants into Canada. The ring is led by Ah Ming, a "half-breed" who goes by the name of Dr. Lawler. When Blake encounters Lawler, he is experimenting on a white mouse.

In Shanghai, an American girl who helps run an opium ring meets an American agent disguised as a mining engineer. The two fall in love, and she has to determine where her loyalties lie.

The love story of an abused English girl and a Chinese Buddhist in a time when London was a brutal and harsh place to live.

Mildred Garson, secretary and fiancée of playwright Anthony Moore, would like to play the leading role in his new play, a crook drama. Her brother Jim and sister Rita arrange to stage a fake robbery at Moore's home so that Mildred can demonstrate her ability. However, real thieves led by Dan "The Fox" Grogan appear, shoot Moore's butler, and kidnap Mildred. She manages to escape and find refuge with Chong Wo, a Chinese philosopher. In a fight to the finish, Wong arranges for Grogan to be captured, leaving Anthony and Milfred to get married.

A white child is adopted and raised by a Chinese citizen and brought to San Francisco, where no one surmises that she is actually not Chinese.

When a girl tries to drown herself in the Seine, she is rescued by dancer Gonzalo Montrez. She then becomes a famous dancer known as the White Moth.