Malo is a disgraced police officer. Dismissed from an important murder case in his home city of Lot, he is sent to Madrid as a simple neighborhood inspector. There, he is assigned a case that he initially finds monotonous: investigating the harassment of foreign widows. Malo immerses himself in a passionate tour of the obscure labyrinth of the enormous city of Madrid that the endearing police commissioner, Bienzobas, calls the Great Fog. Malo in Madrid or the Case of the Polish Widow is one of the best examples of the literary work of Juan Pedro Aparicio. A novel that, with its fast pace, its ingenious humor and its subtle irony, traps the reader from the first to the last line.