A man he's only just met asks Makoto if he can help him figure out who killed his son five years ago. Thus begins some detective work for Makoto, which ends up digging up things that perhaps should have remained buried in the past.

Someone called Shadow is going around beating up G-Boys, and all the victims happen to be under Hiroto's command. Hiroto suspects Takashi is responsible, so Makoto has to figure out who hired Shadow before a war breaks out.