The Laughing Man, having returned after a six-year absence, threatens to assassinate the Superintendent-General of the police. Everyone is in an uproar over his return. Aramaki, however, thinks it's a cover-up. He briefs Section 9 on the prime suspect, Nanao=A, an incredibly gifted programmer who developed the micro-machines that are currently the foundation of Serano Industries. Still, it's just too perfect. The team splits up and investigates.