Set in a world where the concept of music ceases to exist. the story begins when a boy encounters Myuu, a mysterious girl who possesses an audio input jack in her body. The two intermingle with the history of rock music and embark on an unforgettable journey.
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.
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.
Echo and Mu continue their journey to find Jimi and end up in Londinium. In Londinium, Mu is asked to participate in their plans for Christmas, which is one week away.
With Mu's awakening, Tommy has big plans to do the Freedom Project right this time. In the meantime, Echo runs into Nir on the streets of Londinium.
Echo finds himself in the strangely tranquil town of Clarksdale, where he learns a little more about Jimi and a little more about himself.
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.
The Earless seem unstoppable, bent on destroying the world that has treated them so cruelly. Echo, with his newfound power as a Player, challenges the King of the Earless with his trusty AC30.
