The soon-to-be-retired South Korean army commander Chun-Yu (played by Kao Geng-pyo) accidentally picks up a first prize ticket floating towards him near the tight inter-Korean military line one day, but accidentally, let this lottery ticket float to the untouchable North Korea. In order to realize his dream of leaving the army with a bonus of 5.7 billion, he went to great lengths to find lottery tickets, only to be picked up by North Korean soldier Rong Hao (Li Yigeng). No, no, no. Qianyu, who passed by the lottery ticket, and Rong Hao, who is just a piece of paper in North Korea, must go to South Korea to exchange the lottery ticket for a bonus, plus unexpected members to join together, in order to stick to the huge bonus of 5.7 billion yuan, the two sides decided to "cross the line" to launch thrilling secret negotiations.
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