- After a nuclear war devastated Earth, humanity now lives underground without the use of daylight
- In the poor Aurora City, a dangerous tournament is held for youths to battle over scarce resources
- Adopted lad Cill Cordon enters the tournament; a boy whose mysterious origin is yet to be deciphered
“Aurora City” is a place that never knows sunlight. Due to limited resources and for the sake of racial purity, every 10 years, all young people in the city should fight in a big tournament. This year, Cill Codon, who has an unusual black hair and eyes is eligible for the dead-or-alive survival battle...