Shizuko Akiyama is a successful executive secretary whose structured, professional life is on the verge of a happy marriage. However, an unexpected reunion with Koizumi, a former associate and long-time admirer, sends her world into a tailspin. What begins as a nostalgic encounter quickly descends into a dark exploration of obsession and power. Shizuko finds herself ensnared in a seedy underworld of sadomasochism, where her will is tested as she is systematically transformed into a submissive partner.