The scene is Shanghai, where virginal missionary Pauline Garon finds herself the object of lust of the local Chinese crime lords. U.S. Marine Kenneth Harlan falls in love with Garon, while seductress Margaret Livingston sets her sights on Harlan. Once he disentangles himself from the troublesome Livingston, Harlan joins forces with his topkick pal Eddie Gribbon to rescue Garon from the heavies. The semi-satirical tone of the film is forgotten during the climactic assault on the mission, where the body count nearly exceeds anything toted up by Rambo. Director Louis J. Gasnier, normally one of the least exciting of filmmakers, manages to invest more action than usual in Streets of Shanghai.