When Kalinin and Tessa investigate the capture of a suspected terrorist by the Japanese governement, they expect the procedure to be routine, but find it's anything but! Then, when Tessa turns to Sousuke for help, a seemingly jilted Kaname only increases the drama quotient. And the threesome's problems grow exponentially when they learn about the existence of a mammoth AS known as Behemoth, with which the terrorists plan on destroying the city... Will it be "sayonara Tokyo"?