Joint Security Area at the border of Panmunjom.
One day, a North Korean soldierin the post was killed by an unknown bullet, triggering a gun battle between the two sides. The most suspected perpetrators were South Korean soldiers who were also on the border, but the South Korean side accused North Korea of arguing first, and both sides believed that their opponents should be responsible for this.
In order to resolve this headless case, the North and South agreed to a neutral country to conduct investigation and coordination. Swiss nationality Korean girl Sophieby the school to come to investigate the incident, South Korea's Lee Soo-hyuck hereremained silent, while the DPRK side survivors Wu Jingbihas shown a hostility, something confusing. With in-depth understanding, Sophie discovered that there was an inside story hidden in the matter, and there was another person at the scene.
