In Los Angeles, naive and lonely waitress and aspirant singer Carol finds an advertisement for a job opportunity in Tokyo. Traveling to Japan to work at the White Orchid nightclub, she discovers the scheme of prostitution in the club that belongs to Yakuza. Alone, without money and her passport, she is protected by Shiro, but pressed by the managers Madame Mori and her husband Hatanaka to be receptive to client's proposals.

Famous detective Charlie Chan is called out of retirement to help a San Francisco detective solve a mysterious series of murders. With his bumbling grandson as his sidekick, Chan also encounters an old nemesis known as the Dragon Queen who is the prime suspect.