Matsuri, a married woman, harbored an unfulfilled longing that her sex life with her husband could not satisfy. Her deeply matured desires now seek new excitement directed toward her brother-in-law. She isn't searching for love, but rather a fleeting pleasure. A burning passion ignites within her most intimate depths, swirling into a forbidden relationship with her brother-in-law. As her desires intensify, she is swallowed whole by the whirlpool of ecstasy.