Former Marine and elite sniper Livai, who has lost the meaning of life, agrees to a top-secret mission: to spend a year alone in a watchtower on the edge of a vast gorge. On the other side of the gorge, a Lithuanian sniper named Drasa is also stationed in a similar tower. Their mission, which dates back to the early days of the Cold War, is to ensure that monstrous "hollow men" do not emerge from the fog. Although the Western and Eastern envoys are forbidden to communicate, Livai and Drasa soon establish contact and fall in love with each other.