In the late Edo period, kunoichi Ogin (Uehara Ruka) and Okyo (Shizuku Tsuki no) are given a secret mission to assassinate Fufulin Genryusai (Randa), a shogunate spy. Meanwhile, their master Fukuchi Shokan's granddaughter, Sanae (Yuka Satsuki), is captured by Genryusai's men while transporting a secret imperial decree. Upon learning this, Ogin and Okyo rush to rescue her, only to face an unexpected turn of events. The story unfolds as a tale of women caught in the currents of history, confronting torture, rape, restraint, and humiliation with unwavering resolve.