Four upper-class housewives stay at a luxurious hot spring resort in Hakone, known for its renowned spa facilities. Exhausted from daily housework and childcare, these married women seek temporary escape and visit the hotel's exclusive massage parlor. Though they verbally resist, their bodies instinctively respond. Overcome by rising desire, they shed the constraints of their ordinary lives and unleash their hidden sexual cravings. The scene unfolds into an intensely captivating display of impulsive passion.