FORTUNE — You don’t have to understand a word of Korean to know what this movie is about.

“Another Family” was the second-highest-grossing film in South Korea last week, according to the Wall Street Journal, despite relatively narrow distribution in local theaters.

According to the filmmakers, the movie is based on the true story of a working-class family whose daughter contracted leukemia while working at a Samsung semiconductor factory.

From the Journal:

“There are also 39 other cases involving Samsung Electronics factories pending either in court or at South Korea’s state-run welfare agency, according to the labor rights lawyer representing them. A Samsung spokesman declined to comment on the cases and the movie on Monday, but described the claim about the company’s influence on the film’s production and distribution as groundless.”