107 years ago, the Moon was destroyed in a massive cataclysm that shattered Earth's former satellite into 81 quintillion tons of orbital debris. However, thanks to super-science, the Earth itself was saved and today no one really thinks much about that century-past disaster. Which is why when teenage Haruka Amami auditions for something called the Idolmaster Project, she THINKS she's trying out to be a singing idol. Instead, Haruka finds herself at a secret school run by the Mondenkind Agency, living with a group of other girls who have also been selected as candidates to pilot an iDOL - an advanced robot specifically designed to intercept falling chunks of moon rock. Except, the people who run the Mondenkind Agency aren't exactly knights in shining armor. And then there's the question of whether the iDOLs are really JUST robots. Because from almost the first moment, Haruka starts to feel emotions resonating from within the iDOL called Imber.

Et sted i udkanten af vores solsystem indtræffer det utænkelige. En gigantisk asteroide kolliderer med et mindre himmellegeme og ændrer retning – med kurs direkte mod jorden. Den brændende meteorregn, som slår ned med ødelægende kraft, er kun en forsmag på det, der vil komme.

Blot nogle dage fra at nå atmosfæren nærmer Kassandra sig; en meteor tre gange så stor som Mount Everest og med en kraft, der på et øjeblik kan tilintetgøre alt levende på planeten Jorden.

After an "end of the world" event actually doesn't happen a group of friends then have to move forward having revealed all their darkest secrets to one another.