At a secluded hot spring inn, a married woman surrenders herself to a two-day, one-night journey. As the primal instincts of man and woman call to each other, their erotic relationship rapidly intensifies. Amid the fear of being discovered by her husband, feelings of guilt and pleasure intertwine. Her strong desire to remain a desirable woman drives her to seek even more intense passion. In this quiet, hidden place, a woman's concealed desires transform into a series of deeply moving sexual encounters.