In the fictional city of Santa Teresa, located on the border between Mexico and USA, the researcher Juan de Dios Martínez straddles the line between journalism and detective work. Based on an unfinished book by Roberto Bolaño, his character investigates a handful of crimes and abuses perpetrated on women and workers of the zone.

Stela, a young Brazilian actress, decides to make a work on the letters exchanged between Latin American plastic artists in the 70s and 80s. She travels to Cuba, Mexico, Argentina and Chile looking for her works and testimonies about the reality they lived during the dictatorships that most of these countries faced at the time. In the midst of the investigation, Stela discovers the existence of Ana, a young Brazilian artist who was part of this world, but disappeared. Ana went from southern Brazil, from a small town in the interior to Buenos Aires. Obsessed by the character, Stela decides to find her and find out what happened to her.