In a world where all heroes are dead only one is left alive, but her only super power is regeneration making her only a street level fighter

Over the centuries there have been stories of Demons, Monsters, Spirits, Demi Gods, and Gods. The descendants of these beings are called the Kindling and there has been a sudden emergence of gifted people. The number is unknown, but is estimated to be thirty percent of the population. A girl named Kit fights in an underground arena for spare cash against other Kindling.