Echo makes a simple living, sorting through trash for anything of value. But one day, he finds a girl in the scrap field, and suddenly, the legendary Players who pilot mecha called Equipment to fight the Earless aren’t just stories from faraway places.

Running away from the aftermath of their first battle against the Earless, Echo and Mu are once again ambushed by the Earless. Plus, the mysterious trio of women who tracked them down aren’t far behind.