Captain Ahab (HA Jung-woo), who works for private military company Black Lizard, is tasked with carrying out a top secret mission for CIA. His mission is to infiltrate a secret underground bunker 30m below Korean DMZ and take out a target. The mission immediately derails when the target turns out to be none other than Supreme Leader of North Korea himself, who has incredibly high bounty on his head. Ahab and his 12 men go in for the jackpot against CIA’s wishes. The bunker is demolished and Ahab is in critical condition. When the Supreme Leader suffers a devastating injury, he has no choice but to team up with an elite North Korean doctor (LEE Sun-kyun) to not only save himself but his target and get out of the bunker in one piece.