In the vast, unnamed metropolis of Hello ... Hello, art and commerce have finally and completely conjoined; stylish caf s serve up zebra mussels and the air is thick with a gentle rain of sparrows plummeting down from the mirrored office towers. Everywhere, people are falling for an edgy new fashion accessory: a shiny ball filled with poison that hangs from a delicate chain. In this oddly peaceful world, Cassandra, a salesgirl at a...