The life of an Infant Demon is a bloody grind to the top. For Salvos, a curious newborn Demon with a penchant for making friends, surviving the swarms of wild Demons in the Netherworld was always going to be a difficult task. She will adapt, gain experience, and evolve to survive this hellish landscape with the help of her sole companion.

But when her companion's life is threatened by a mysterious Demon King, she'll have to do what it takes to save him. Even if it means separating from him and being tossed into an unfamiliar world with Humans, monsters, and a bright blue sky where she is scorned for being born a Demon.

The law of evolution is survival of the fittest, and Salvos will survive.