Jae-hyeok lives with his mother, his sister-in-law and nephew Min-jae in a small Korean town. He is dating a woman named Yeon-joo, while working at the local nuclear power plant. Meanwhile, Pyeong-seok works at the same plant. He is worried about the conditions there, but nobody in the government listens to him. An earthquake strikes the small town where Jae-hyeok lives and causes explosions at the plant. The situation quickly spirals out of control, leading the entire nation to panic. To prevent another nuclear disaster, Jae-hyeok and his co-workers return to the nuclear power plant.

https://en.wikipedia.org/wiki/Pandora_(2016_film)
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