Barrios bajos (The Slums) is a 1937 Spanish black-and-white film directed by Pedro Puche.

[2] The plot concerns an erotic triangle formed by Ricardo, a lawyer who has assassinated the lover of his wife and is searching a place to hide from the police; Rosa, a young attractive woman who had to leave the wealthy house where she worked as a maid because of a case of sexual harassment by the owner of the house; and El Valencia, a port worker who hides Ricardo as a repayment for an old case in which Ricardo defended him on the court and who defends Rosa from an evil procurer, Floreal.

In the same hostel arrives Rosa who is unemployed since she left her previous job as a maid after her boss tried to rape her.

El Valencia finds a job for her in the hostel to save her from being prostituted by Floreal who engages in sex trafficking and who, with the help of a bawd tries to make her work in a brothel.

[4] The film depicts social phenomena related to prostitution of low class women, which has historically been common in El Raval neighborhood (where the Barrios bajos refers to).