In a world overrun by monstrous bugs and ravaged by outlaws, there's only one person to call when you need a job done right: Honoka. With a sense for danger, exemplary sword skills, and a smart-aleck A.I. tank by the name of Bogie, Honoka is ready to tackle any job and solve any problem for her clients. One night while crossing the desert, she finds a young man alone in the wasteland.
Honoka and Bogie pick up the long-awaited PSP from Zankan. Just after parting ways, Honoka senses an alarming presence pass overhead. It's the Auto-Enforcer Blue Breaker, whose name is synonymous with terror -- and it's heading right toward her friends.
After leaving Millie in the care of a relative and parting ways with Iks, Honoka and Bogie head back out to the desert for another job. But while they camp, Honoka is awakened with the news that an armored ant clings to the tank.
The Third continues to monitor the rapidly expanding white light. It's a spatial distortion created by Gravestone, a weapon left over from the Great War. Meanwhile, Honoka does a job for Emporium's chief administrator. On her way to the sand dragon nest, a dune buggy catches up to the tank, and a strange woman Honoka met earlier in town steps out...