Enna hopes that her new knowledge of how to wield fire will help protect her good friend Isi--the Princess Anidori--and all of Bayern against their enemies, but the need to burn is uncontrollable and puts Enna and her loved ones in grave danger.

Rin has always been a quiet, helpful girl, but a secret has been eating away at her, and the solace Rin once could find among the tall trees surrounding her forest home has vanished. When she leaves home to join her older brother in the city, she finds intriguing answers to her questions, an adventure she doesn't expect, and a sense of self she never thought she would find.