PMC means military industrial company. The film tells the story of a secret operation that took place in a bunker 30 meters underground in Panmunjom during a period of tension between the North and the South. The Korean mercenary leader Ahab (played by Ha Jung-woo) and his team members were involved. Lee Sun-kyun plays the role of Yunji, a North Korean military doctor. The timeline of the story will be consistent with reality, telling the story that takes place in a limited space within 90 minutes. Many non-Korean actors will play multinational mercenaries in the film, and the final presentation effect is believed to be refreshing to the audience.