[1] Set in the late 1920s, it stars Ana Fernández, Nadia de Santiago, Blanca Suárez and Maggie Civantos.

The series tells of how the lives of four young women change, after they start working for this company, which offers them decent pay and some independence.

Alba Romero, who goes by the name Lidia Aguilar, to conceal her identity, seeks a job at the telecommunications company, to complete a mission.

[7] The idea for the series began with Ramon Campos and Gema R. Neira, who worked together on the screen writing, along with José Rustarazo, Jaime Vaca, Carlos Portela, Almudena Ocaña, Paula Fernández, and Flora González Villanueva.

For the final season Netflix recorded a trailer in the form of a short documentary about the 'last cable girl' of Spain, Magdalena Martín.