The women searching for their missing loved ones are not actresses but real women called "las buscadoras", the searchers. Women who have organized search parties in hopes to find at least the remains of their missing family members.
The protagonist, Julieta Egurrola, is the mother of director and writer of the movie; Natalia Beristáin.
By the end of the last scene shot, in 2021, the official number of missing persons since the 60's was of 90,000. Now that the movie premiered on January 11th 2022, the number has risen to 108,000.