It doesn't appeal to me so much.
Basically, you merg two differnet styles together that don't fit. An elf and a dwarf walking alongside over the street packing a .99 mm sounds to strange to me.
Keep in mind that I've never played it before.
BTW, the story is cool though.
I think you should play it like a Vampire "the masquarade' game.
Players have TONS of options and can do way more then they can in a fantasy setting. Take mobile phones for instance. Everybody can go somewhere else and the can still talk to each other. In a fantasy setting, this isn't possible (except for heigher levels). They can even travel the world in 12 hours!
Keep the idea of your story in your head, know all the characters and know what's thair roll in the sories.
Keep some events ready to progress the story, but let the players do what they want and play into that. It's a fun way to DM since even you don't really know what's going to happen. Freestyle it baby.
this is from my experience playing Vampire.
