Lee Byung-hun in No Other Choice.

VENICE 鈥 It took Park Chan-wook two decades to bring his latest film No Other Choice to the screen, but the South Korean director said on Friday the story鈥檚 core theme of job insecurity was more relevant than ever as technologies march into the workplace.

Mr. Park, who shot to international fame with his violent 2003 thriller Oldboy, said he struggled for years to obtain financing for his latest work, a biting satire that blends jokey comedy with bleak social commentary.

But he kept faith in the project because people remained deeply connected with its focus on economic anxiety.

鈥淲e all harbor that deep fear of employment and security,鈥 Mr. Park told a press conference ahead of the film鈥檚 premiere in competition at the .

No Other Choice follows a paper industry veteran, played by Squid Game star Lee Byung-hun, whose life falls apart after he is unexpectedly laid off. With his family facing eviction and their luxuries rapidly stripped away, the troubled hero sets out to eliminate potential rivals for a new job in a darkly comic killing spree.

The movie is based on Donald E. Westlake鈥檚 1997 horror-thriller novel The Ax. Mr. Park told Reuters that updating the story to today鈥檚 world made its backdrop, an artificial intelligence (AI)-driven, automated workplace, more resonant.

鈥淭wenty years ago, we couldn鈥檛 have imagined a fully AI-controlled, automated factory,鈥 he said. 鈥淢aybe that is the reason it took me so long to make it.鈥

Besides weaving in the latest technological advances, Mr. Park said he also added a starker, more ambiguous ending.

鈥淎ll the horrific efforts (the protagonist) makes to protect his family, sacrificing his own humanity, ultimately lead to the (moral) collapse of the family,鈥 he said.

Mr. Park is one of Korea鈥檚 most feted directors and the ensemble team of actors who flew into a stormy Venice to promote the film said appearing in one of his films was a professional dream, even if his meticulous approach pushed them to their limits.

鈥淗e does ask quite a lot from you, he鈥檚 very demanding,鈥 said Mr. Lee.

Son Ye-jin, the female star, whose fame skyrocketed thanks to her role in the TV series Crash Landing on You, admitted that she initially struggled with Mr. Park鈥檚 painstaking direction.

鈥淚t鈥檚 so detailed that for example, he would say to put more emphasis on a syllable or walk in a certain way… But as the shoot went on, I realized he was spot on and my acting really improved,鈥 she said.

Both Mr. Lee and Ms. Son were greeted by screaming fans as they hit Venice鈥檚 red carpet, underscoring how much South Korean culture now resonates in the West.

鈥淪eeing the fans here in person has allowed me to feel firsthand how much K-content is loved, and that makes me very happy,鈥 said Mr. Lee.

No Other Choice is one of 21 films competing for the prestigious Golden Lion prize, which will be awarded on Sept. 6. 鈥 Reuters