Black Widow Business

In Osaka, Sayoko Takeuchi (Yoshino Kimura) indulges in her evil ways. She targets old wealthy men and marries them for future inheritances. She works with Toru Kashiwagi (Katsunori Takahashi) who runs a marriage agency. Sayoko Takeuchi is married to a wealthy elderly man.

One day, Tomomi Nakase (Tae Kimura) hears her father was taken to the hospital. She rushes to the hospital and learns her father is unconscious. She also hears for the first time that her father is married to Sayoko Takeuchi. Tomomi Nakase takes the first steps in stopping Sayoko Takeuchi from gaining her father's fortune. She hires private detective Yoshinori Honda (Tsuyoshi Ihara) to investigate Sayoko Takeuchi and Toru Kashiwagi.