Although the title (which translates as "Murders in Chicago") promises a gangster story, this is more of a murder mystery that kicks off with the seemingly accidental death of a construction worker, followed shortly after by that of a noted publisher (an uneasy-looking Eduardo Fajardo). What follows is a very confusing story in which the police, a police coroner (José Campos) and a vagrant (Fernando Sánchez Polack) who witnessed Fajardo's death embark on separate inquests on what actually happened. Meanwhile, June (María Luisa Rubio), who works as a secretary for the publishing company, is under pressure by a blackmailer (Antonio Jiménez Escribano) who has pictures of her in the sack with the deceased publisher.
José Campos
José Truchado
Fernando Sánchez Polack
María Luisa Rubio
Isana Medel
Marian Bru
Ernesto Arroniz
Bernardette Bernier
Juan Antonio Soler
Antonio Escales
Julio Cifuentes
Guillermo Méndez
Manuel Díaz Velasco
Francisco José
Antonio Jiménez Escribano
Eduardo Fajardo