Ten years after the fateful clash between two opposing sides of the Divine Kingdom of Lyoza, Elin lives a peaceful life with her family. She tries to stay as far away from her past as possible—the girl who communicated with creatures and befriended a Royal Beast wants no part in the power struggles of humans. But when Elin is called upon to investigate a mysterious illness that's stricken the Toda, she uncovers a startling plot—one that could threaten everything she holds dear.