In 2034 , two years after the events of 2nd GIG , Public Security Section 9 is investigating a string of mysterious suicides by refugees from the Siak Republic . Chief Aramaki conduct a raid to arrest the refugee dictator only to find him already dead . In retaliation , a Siak operative plan a terrorist attack with a micromachine virus . Batou is sent to intercept the Siak operative and encounter Kusanagi , who is conducting her own investigation . Before they can apprehend the operative , he die while attacking them . Kusanagi take a case of virus ampules and warn Batou to stay away from the Solid State Society before leaving .