Argentine filmmaker Emilio Vieyra, best known for The Curious Dr. Humpp (1969), also directed this 1963 tale of vengeance that centers around a seedy Buenos Aires nightclub. Known at home as Testigo para un crimen, it was released in the U.S. in 1966 with a pervy new title along with added scenes featuring nudity and kink such as the "dance of the velvet whip" with a fishing net so memorably featured in the campaign. Blonde Libertad Leblanc (The Pink Pussy: Where Sin Lives) is Blondie, a singer at the aforementioned club that's also home to an illegal gambling operation and murder. Also with popular Argentine television star José María Langlais (Masterworks of Terror), Julio deGrazia (the Superagentes adventure comedies), and drag queen Michelle from the 1961 Argentine proto-mondo America By Night.