Roseus Book 1 follows the travels of Chizue, a twelve year-old girl, and five year-old twin sisters, Akiko and Kirara, through the welcoming and sometimes hostile countryside of Old Japan. Due to an unfortunate incident in the neighboring town, Yamada, their relatively peaceful lives are threatened compelling them to leave the clearing they call home. Questions arise and they turn to search for the elusive "gray one". To their dismay, the journey forces the three to face the deep dark truths of the land they live in. With their bonds and perseverance, they confront the ever perilous challenges that lay ahead. Will they overcome and find the truth they seek?