Based in the story by Robert Louis Stevenson, "Olalla" tells the story of a gothic and decadent family of genetic vampires who need human blood to survive, and where incest is the only way to maintain the family line.

Paris, 1930. Luis Buñuel is penniless after the scandal surrounding the release of his last movie. Sculptor Ramón Acín, a good friend, buys a lottery ticket and promises Buñuel that he will pay for his next movie if he wins the prize.

Spain, 1932. Spanish filmmaker Luis Buñuel travels to the region of Las Hurdes, in Extremadura, where he shoots his third film, a very critical and later controversial documentary about the living conditions of the poor peasants, abandoned and forgotten by the national authorities.