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.

Rescue comes unexpectedly in the form of more faces Echo recognizes from the Players almanac. Mu learns more about the war that happened ten years ago, and about the Core Part in her possession.

Echo and Mu's first stop in their investigation into the mysterious Jimi Stonefree is Freak Scene Academy. There, the academy's director offers them the school's file on Jimi in exchange for their help.

The trail to solve the mystery of Jimi Stonefree leads Echo and Mu to a glittering purple city ruled by Denka.

Echo and Mu follow Jimi's trail to Gnome Country, where they discover the fate of the people who were betrayed by the rest of the world.