The first of a series of four "G-Man" films produced by George A. Hirliman's Condor Productions (with all four starring Conrad Nagel and Hirliman's wife, actress Eleanor Hunt, in continuing roles), "Yellow Cargo" has G-Man (nee FBI) Alan O'Connor (Conrad Nagel) being "borrowed" by the United States Immigration Service to track down a smuggling ring on the West Coast, which is engaged in bringing in Orientals to the U.S. in violation of the Chinese Exclusion Act. O'Connor is met at the airport by reporter Bobbie Reynolds (Eleanor Hunt), who mistakes him for a New York actor in search of a movie job in Hollywood. O'Connor falls in with her plan to introduce him to some producers, so he can get a line on the leaders of the smuggling ring, who are operating under the guise of an independent motion picture company.