Hiro Protagonist is a hacker and pizza delivery driver for the Mafia. He meets Y.T. (short for Yours Truly), a young skateboard Kourier (courier) who refers to herself in the third person, during a failed attempt to make a delivery on time. Y.T. completes the delivery on his behalf and they strike up a partnership, gathering intel and selling it to the CIC, the for-profit organization that evolved from the CIA's merger with the Library of Congress. Within the Metaverse, Hiro is offered a datafile named Snow Crash by a man named Raven who hints that it is a form of narcotic. Hiro's friend and fellow hacker Da5id views a bitmap image contained in the file which causes his computer to crash and Da5id to suffer brain damage in the real world. Hiro meets his ex-girlfriend Juanita Marquez, who gives him a database containing a large amount of research compiled by her associate, Lagos. This research posits connections between the virus, ancient Sumerian culture, and the legend of Tower of Babel. Juanita advises him to be careful and disappears.