At a hot spring where married women's desires run high, various illicit affairs unfold. Caught spying on the men's bath, one woman is forced to surrender her body to an employee as punishment. Another is passionately taken by her brother-in-law right beside her sleeping husband. During a company retreat, married women give in to temptation, entwined with lovers who crave their voluptuous bodies. In the intimate setting of the hot spring, the wives' passions intertwine, igniting intense and steamy encounters.