As head of the ENSI student union, Lux has never been more popular, and most importantly: he's stopped stalking. But during the association's back-to-school party, a mysterious hacker steals the evening's funds. To defend himself, he has no choice but to relapse into an old addiction… stalking.

Lux's detractor now has a name: the White Duke. Lux now suspects her friend Zoe, while continuing to keep a close eye on Charlie. Charlie, meanwhile, is getting closer to her sworn enemy, Alex, in preparation for a dubious hack. But the next victim seems to have been chosen: Alma.