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.

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

After running away from the Freak Scene Academy, Nir arrives in Londinium to find a bleak city with two angry youths eager to show up the government's handling of the Earless.

With the appearance of Listeners, King of the Earless, the Earless have grown ever more destructive. Roz, Denka, Kevin, and Bilin must each decide how they want to face this crisis.