[2] Set in the late 1970s in Barcelona's Modelo Prison, the plot consists of a critical revision of the so-called Transition in Spain, focusing on the plight of inmates imprisoned on common charges claiming for an amnesty that, unlike the case of fellow political prisoners, never came to pass.

[10] The crew featured other recurring Alberto Rodríguez' collaborators such as Álex Catalán (cinematographer), Pepe Domínguez del Olmo (art director), José G. Moyano [ca] (editing) and Julio de la Rosa [es] (composer).

[17] TelevisaUnivision obtained rights to the film in Mexico, the United States, and Latin America, with a streaming debut on Vix+ scheduled for 22 March 2023.

[20] Raquel Hernández Luján of HobbyConsolas rated it with 80 out of 100 points ("very good"), deeming the film to be "respectful of the harsh reality it portrays and at the same time [it] manages to take the story out of the corset of prison dramas".

[21] Àlex Montoya of Fotogramas rated the film 4 out of 5 stars praising the "rigor and critical thinking at the service of entertainment, or vice versa.