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The film follows a young boy named Ranko who discovers a large German Shepherd in the mountains, a remnant of the recent war. After freeing the dog from a trap, Ranko befriends the animal and, based on an inscription on its collar, names him Hund. However, the local villagers mistake the dog for a dangerous wolf, a "lone wolf," and resolve to kill it. Fearing for his new companion's safety, Ranko secretly brings food to Hund in the mountains. In a turn of events, the dog saves Ranko from a real wolf attack. The villagers, convinced that this "lone wolf" is responsible for killing sheep, organize a hunt. In a climactic moment, Ranko manages to save his loyal friend from the hunting party, solidifying their bond.