'Locked Up' or 'Vis a Vis' is an extremely interesting Spanish TV series that pursue the life of women prisoners impersonating various characters. Besides the well-playing of characters, the action is surprising from the first season to the fourth. Alba Flores, the actress that was cast for 'La casa de Papel' (Money Heist) as Nairobi, has a spectacular role in these series as well.
However, my favorite character in this movie is Zulema. Even if she is kind of evil, some of her intentions and results can make sense in such a taught place as a prison.
If you do not have a very sensitive heart and you are interested in the psychology behind the bars, I definitely recommend you to watch it.