Freelance journalist Yayoi Kunizuka joins Unit One as an investigation consultant to fill the gap left by Kei's suspension. As the investigation progresses, Unit One uncovers Karina Komiya's greatest secret. Guessing that Karina will be the next to be attacked, they rush to her gubernatorial debate at the Giga Arena.
It happened seven years ago,
during the Helmet Riots.
Es geschah vor sieben Jahren,
bei den „Helm-Krawallen“.
Ocurrió hace siete años,
en los disturbios del Casco.
C’est arrivé il y a sept ans,
pendant les Émeutes des Casques.
È accaduto sette anni fa,
durante gli scontri dei Caschetti.
Foi há sete anos,
na Rebelião dos Capacetes.