Two North Korean soldiers are killed in the border area between North and South Korea, prompting an investigation by a neutral body. The sergeant is the shooter, but the lead investigator, a Swiss-Korean woman, receives differing accounts from the two sides.

聚焦危机四伏的美墨边境，将一宗复杂的谋杀案与边境线上棘手的移民问题勾连了起来。