Mary Bruce is wooed by Lord Haverford but loves Roger Benton, her father's secretary. To finalize his marriage proposal, Lord Haverford offers her father a large sum of money and, being low on funds, Mr. Bruce accepts it, then places it in a safe. Horrified by her father's actions, Mary steals the cash from the safe that night, but on her way out is overcome by another thief whose wrist she bites in the ensuing tussle.

Dan and Tennessee are successful gold miners. Ace Brady learns of their success and sends Fox to rob them. During the robbery Fox shoots Tennessee and Ace arrives to arrest Dan for the murder. Dan escapes but is now a wanted man.

It is prior to the commencement of World War II, and Japan's fiendish Black Dragon Society is hatching an evil plot with the Nazis. They instruct a brilliant scientist, Dr. Melcher, to travel to Japan on a secret mission. There he operates on six Japanese conspirators, transforming them to resemble six American leaders. The actual leaders are murdered and replaced with their likeness.

In Japanese-occupied China, Madame Kwan Mei is the leader of a resistance organization based in a rural village. When two American airmen are shot down near the village, she makes plans to rescue them and have them help her organization. Then, when Japanese General Kaimura arrives in the village, she realizes that a major operation is imminent. She decides to impersonate an aristocrat, in order to win the general's confidence and learn his plans.

A dancer is pinned for murder after his shoe prints are found at the scene of the crime. His wife follows the trail of clues to the genuine killer.

Jim Gray is looking for the gang leader known as the General. When Neil Denham is murdered, Jim assumes his identity. He and his pal Squint Saunders then try to join the gang. But they get captured and Jim is told he can join up only if he kills his friend.