The Defense Force's Tachikawa base is attacked by a horde of monsters that fall from the sky.
However, with the struggles of the agents, the Yeosu begin to push back, and Hoshina fully releases her power to fight the giant monster.
Just when it seemed the decision was made, a change occurred in the giant monster...?! And Kafka's detection ability also reacted to 'it'.
What appeared at that moment...?! ――The fourth volume of "Threats" continues!!