This is absolutely phenomenal. Not only in the sense of what you're trying to achieve (A last goodbye song, warning the passerby of their troubles), but in the way in which you're achieving it.
The child singing provides a lead-in to the song, completely silent except for her voice. Then, the piano and orchestra get to work, providing a backbone for the child and the chorus that comes after. The moment at 1:50 provides a bit of hope for our characters, and then it's back into despair. Then, my favorite composition part, 1:52, comes into play. Balancing low bass notes with no strings and strings with no bass notes provides a push-pull aspect of the piece which keeps a sway going, moving the track along, and providing images (at least in my head) of the characters gathering around and swaying back and forth as they sing their tragedy. Of course, more buildups and dropdowns occur throughout the song before ending how it started: With the child singing alone once more, as she relays her message to spread the word, and/or help the characters.
The entire 8 minutes is not a chore to listen to, as the composition breaks up just enough to keep the listener entertained. For what the song is, it does a damning job (That's good!). There's nothing wrong to note here. Keep up the fantastic work here!