Haruto informs the group that a massive and lethal Zone is approaching the Planet. With time running out, Ibara comes up with a last-ditch plan to evacuate everyone from the area using an old train that has been out of service for ages.

The Diversion Team find themselves in serious trouble when the 1st Division brings out their secret weapon, the Iron Spider. As Ibara tries to hold off the Ozu Sisters, Aoi is left with the task of stopping the attacks.