A cheating man escapes to a southern island seeking relief from reality, accompanied by his mistress—elusive and beautiful gravure idol Umi. Responding to the man's lustful impulses, she alternately soothes and torments him, her eyes filled with quiet sorrow. Gradually, her ultimate body is revealed: her erect, pebbled nipples, her glistening form drenched during ice play, and her breathy moans under sadistic massage techniques. As emotions intensify, the experience pushes past limits, culminating in an irresistibly arousing finale—an exquisite, boundary-breaking erotic masterpiece.