The backstory of protagonist Seong Gi-hun, a car factory worker who was laid off and later went on strike, was also inspired by a real-life event: a 2009 strike at the SsangYong Motor factory, where workers clashed with riot police over widespread layoffs. It's remembered today as one of the country's largest labour confrontations.

The Netflix hit has left a lasting legacy as a major cultural export, but also one that exposed some unsettling aspects of Korean society.