"A schoolgirl, Siu-Man, has committed suicide by leaping from her twenty-second floor window. Her older sister and guardian, Nga-Yee, refuses to believe there was no foul play. Nga-Yee contacts a hacker and cybersecurity expert-known only as N.-to investigate and what follows is a cat and mouse game through the city and its digital underground, where someone has been smearing Siu-Man's reputation. This is not the only hidden drama in the city of Hong...