In 2020, the centenary of the death of the Spanish realistic writer Benito P\u00e9rez Gald\u00f3s, a contemporary of writers such as Dickens, Balzac and Tolstoi, known internationally for novels such as "Fortunata y Jacinta", "Miau", "Marianela", "Nazar\u00edn", "Tristana" or "The disinherited", coincided with the 120 years of the birth of the film director Luis Bu\u00f1uel, known worldwide for films such as "An Andalusian Dog", "Los Olvidados", "Nazar\u00edn", "Viridiana", "The Exterminating Angel" "Belle de jour" or "Tristana".\n\nIn 1969, the most important Spanish film director, Luis Bu\u00f1uel, pronounced the following phrase to his friend Max Aub: "Generally speaking, the only influence on my work that I would acknowledge, is that of Gald\u00f3s". The director of this film digs into it to recount the influences of the Canarian writer, the main Spaniard after Cervantes, in the Aragonese filmmaker. Footprints that are still fully valid today and that are reflected in issues such as childhood, woman, history and religion. "Benito P\u00e9rez Bu\u00f1uel" travels through the Canary Islands, Calanda, Madrid, Mexico City and Santa B\u00e1rbara to discover these connections at a crossroads between the classic documentary, non-fiction, mockumentary and animated film that keeps the viewer trapped. A story with interviews with Elena Poniatowska, V\u00edctor Fuentes, Arantxa Aguirre, Jordi Xifra and Yolanda Arencibia, among others, where names also stand out by Pedro Almod\u00f3var, Catherine Denueve, Guillermo del Toro and Federico Garc\u00eda Lorca. "Benito P\u00e9rez Bu\u00f1uel" is a film that claims the validity of the two great universal creators.