One night, Eduardo (Carlos Villatoro), his wife Cristina (Marta Roel) and their friend, Alfonso (Enrique del Campo) lose their way in the mountains and are guided by a mysterious stranger to an eerie monastery inhabited by the Order of the Brothers of Silence.

The trio find out from a custodian that the monastery has been an empty ruin for many years and that the crypt with the mummified monks has become a tourist attraction.

Their belief that the whole experience was a dream is shaken when, examining the now dust-covered dining table, they find the word "coward" that Cristina had scratched upon it the night before.

El fantasma del convento was co written and produced by Jorge Pezet and directed by Fernando de Fuentes.

Pezet had recently developed a fascination with the desiccated mummies displayed in Mexico's Museo de El Carmen.

Determined to use them for a film, Pezet, along with director Fuentes, and Juan Bustillo Oro developed a screenplay that featured three young adults who are forced to spend the night at a monastery only to discover that their hosts were members of the undead.

The restored film was released on Blu-ray as a Limited Edition with Special Features by the Powerhouse Indicator label on March 21, 2022.