Let's see—futuristic setting, new-fangled technology, and the dangers of messing around with science you don't understand? Yep, this is sci-fi.
But wait just a second. Everything seems awfully... Victorian-era, doesn't it? What with London's rigid class structure and the horrible living conditions for the lower class? It's like a Charles Dickens novel with airships. That means it fits right into the sci-fi subgenre of steampunk, which specializes in stuffing the nineteenth century full of futuristic machinery it never had. It's a little bit retro, a little bit futuristic, and a lot of bit amazing.