The film is loosely based on Estefanía Gutiérrez Lázaro , who died mysteriously in 1991 after performing a séance at school.
The film's success eventually led to a prequel, ( Hermana Muerte ), which was released on Netflix in 2023. The film is loosely based on Estefanía Gutiérrez
Netflix's marketing claimed that only 1 in 100 viewers could finish the film, though critics often describe it more as a "slow-burn atmospheric dread" than a constant jump-scare fest. Cast and Production Details Sandra Escacena Ana (Mother) Ana Torrent Lucía (Sister) Bruna González Irene (Sister) Claudia Placer Antoñito (Brother) Iván Chavero Sister Death Consuelo Trujillo Cast and Production Details Sandra Escacena Ana (Mother)
Inspector José Pedro Negrí filed a report in 1992 documenting moving furniture, a burning photograph of Estefanía, and a crucifix that had been torn from a wall. a burning photograph of Estefanía