Following a shooting in the Joint Security Area separating the two Koreas, two soldiers of the North Korean army were found dead. This case gave rise to a major diplomatic incident between the two countries. In order to prevent the situation from getting out of hand, a young Swiss investigator is asked to conduct interviews with the soldiers who were on duty… She quickly realizes that the various testimonies make the investigation completely untangled… What really happened that evening between the soldiers of the two Koreas in the Joint Security Area?