The theme reminded me of something: the famous (?) gregorian chant of "dies irae". (Please listen to the first three seconds of Was that your intention, or did it just "happen"? Don't get me wrong. I know too well, that these similarities can happen easily to a composer!
It was my intention. [:)] The music to this short film is part of a somewhat longer piece that was rearranged. In the original, the solo string instruments are replacements for the solo singers who sing Dies Irae.