Japan, mid‑nineteenth century. The end of centuries of isolation, a period of storms and upheavals, the final years of the Tokugawa shogunate. The collision between Western experience and Eastern wisdom stirred minds and gave rise to new ideas – sometimes quite dangerous. This was fully experienced by Kodo Yumikura, a renowned healer who had studied under Dutch specialists. After another invitation to the capital, Dr. Yumikura mysteriously vanished. His daughter Tidzuru, unable to bear the uncertainty, disguised herself as a young samurai, took her family sword kodati, and set out for Kyoto in search of her father. On the very first night of city life, Tidzuru witnessed a brutal clash between two samurai groups. The victors captured her, and what a surprise it was when she learned that she had fallen into the hands of the Shinsengumi – false guardians of order in Kyoto, feared by both enemies and friends. Even more astonished was Tidzuru when she discovered that her father was not a stranger to these new acquaintances, and they urgently needed him because Kodo‑sensei is involved in the mystery surrounding the origin of this strange squad. Now the heroine and her allies await the most thrilling adventures.