This is pretty sick. I really love these kind of epic/dramatic/sad track like this. Just like the other guy said, it feels like and epic/emotional talking scene. Like seriously, a scene just popped in my head as I was listening to this where someone has been searching for their friend for months. Then when they finally catch up, the friend is has changed and declares that he is going to the "evil side" while the other friends are desperately trying to convince him not to, even though they have no chance in changing his mind. (I promise, I didn't try all extra hard to come up with it or anything, it just came to me lol) It really sets a powerful atmosphere. It made me visualize a whole environment ant everything.
Now as for the actual feedback, I think the some of the chords that come in should be more prominent (like the one at 1:23). That would have added a lot I think. I did like the choir synth you used, but I feel there are better sounds you could have chosen for that part though. Very nice song overall though! I listened to it like 5 times =p