Searching for the origins of a folk song she'd heard as a child, director Adela Peeva embarks on an odyssey through the Balkans. Her search is rewarded again and again, but reveals that reality is much darker than memory - she discovers the song in a myriad different languages and styles; as love ditty, religious hymn, even military march. The song is a testament to the cultural ties binding the region's warring ethnicities. Alternately humorous and alarming, 'Whose Is This Song?' illustrates the stubborn madness of nationalism.