The Case of Backward Mule

Terry Clane, an expert in the ways of the Orient, returns to San Francisco after another extended stay in China and is promptly picked up by the police. His former girlfriend, Cynthia Renton, is being sought for questioning. Her fiancé, Edward Harold, who has been convicted of murder of businessman Horace Farnsworth and sentenced to the gas chamber at San Quentin, has just escaped police custody and is a fugitive.