While Kaori is gaining recognition as a novelist, she feels a chill in her relationship with her husband in her private life. At the same time, she is asked by her editor to write a work with the theme of women's realistic sexual desire, but she is unable to write as much as she wants because of her own marital relationship that has fallen into a slump and the pressure of writing. In the midst of this, she meets a man who runs a social gathering place for the wealthy, and decides to step into a secret social event called a "mask party" under the guise of an interview. There, men and women who hide their identities and titles with masks are indulging in pleasure as if liberated from social oppression...