The possessions that happened in 2010 which are mentioned by Father Canetti, are the Devils from "Pastorela" (2011).
A spiritual sequel to the film "Pastorela" (2011), which was also directed by Emilio Portes.
This film and Roma (2018) are the only Mexican films to be recorded with a 7.1 or higher sound mix.
Luis Carlos Fuentes, the script author, has also published two collections of short stories that are also based on dark humor/scary topics.
Despite the film being a Mexican production, the majority of the film is spoken in English.