Two North Korean soldiers have been killed, supposedly by one South Korean soldier. However, the 11 bullets found in the bodies, alongside the 5 bullets at the assassin's magazine clip, number to 16 bullets to get a gun that will hold 15 bullets. The investigating Swiss/Swedish team from the impartial countries overseeing the DMZ suspects that the other is involved - each one of which points to a form of pay up. The reality is more tragic and a lot simpler.