A daughter of Hatamoto (high-ranked soldier) Otsuyu (Akiko Kana) and a Ronin living in Choya (cheap apartment) Shinzaburo Hagihara (Yoichi Hayashi) fell in love with each other. They could not see each other for a while, but Otsuyu visited Shinzaburo's place late at night, led by a servant Oyone (Shoko Yagi). Tomorrow night and next night as well.
The federal lord of Kofu, Tunatoyo (Tsutomu Isobe), was elected to be the next General. On his way on a trip to Edo for the ceremony, his scapegoat was shot. Oometsuke ordered an Oniwaban, Shinnosuke Takusyoku (Mikijiro Hira) to take Tsunatoyo to Edo safely. However, the enemy turned out to be his younger brother and the federal lord of Tatebayashi Kiyotake (Yoshihiro Kobayashi). On top of that, the Oniwaban sent by Kiyotake to assassinate Tsunatoyo was Shinsuke's father-in-law, Genshin Uno (Shigeru Kamiyuama).
A wife murdered by her husband borrows the forms of her supposedly dead sister and a cat and takes revenge.
