A married woman embarks on a hot spring trip to express her wavering emotions and desires. She met her husband in college, married shortly after graduation, and three years have passed since then. Believing her role was to support her busy husband, she devoted herself to their life together—until one day she began to wonder, "Is my life just about obeying my husband? Am I disappearing as a woman?" Carrying this inner turmoil, she sets off on a journey with a stranger. This becomes her first and final act of betrayal. Embraced by a man other than her husband, she soaks in pleasure, drenched in arousal, writhing in ecstasy as her heart and body are shaken to the core. By the end of the trip, a new path toward love begins to unfold.