Brad's heart was a wreck. The previous evening he had met a girl he could only describe as perfect. And she had seemed interested between their drinks and dancing. Yet when the party drew to a close, she simply smiled when he asked for a telephone number or email address and told him to look her up. But as best he could tell from a cursory search of the Internet, she was entirely off the grid as well. What was a man to do? Hunt through the city of Beijing door-by-door in search of a single girl?