The Coast Guard

A member of Coast Guard Platoon 23, Private Kang (Jang Dong-gun) monitors a high-infiltration stretch of beach lined with barbed-wire fencing. Driven by the belief that killing a spy is the highest honor, Kang waits eagerly for a chance to prove his worth as a soldier. One night, Kang mistakes a promiscuous couple for a North Korean spy and shoots without hesitation. Despite receiving honors, Kang slowly begins to unravel under the grief of what he’s done. Losing his grip on reality, Kang tries to revert to the life he knew while tensions and paranoia escalate and further tragedy becomes unavoidable. (official distributor synopsis)