Kaori is gaining attention as a novelist, but her marriage has grown cold. At the same time, her editor asks for a story exploring women's real sexual desires. Trapped between a stagnant sex life and the pressure to write, she cannot make any progress. Then she meets a man who runs an exclusive social club for the wealthy and enters a secret masked party under the pretense of doing research. Hidden behind masks, men and women shed their identities and social status to indulge in uninhibited pleasure...