Nurse Nanako, who works at a psychiatric hospital and harbors feelings for a doctor dedicated to caring for his patients, collapses during a night shift and wakes up surrounded by men who violently assault her. Though the experience feels surreal, Nanako becomes paranoid and confides in the doctor she trusts. He suggests, "Why not try being bolder in your dreams?" Deeply affected by his words, Nanako finds herself drawn nightly into a hazy, dreamlike state where she becomes entangled in lewd acts with men.