Kimiyo Sato, a single mother living with her son, is constantly refining her allure as a woman. When she visits a newly opened beauty salon, she unexpectedly finds herself drawn into the sensual treatments offered. Under the skilled hands of an experienced esthetician, her body melts with pleasure from the intense finger techniques. As her beauty blossoms day by day, her growing sensuality deeply affects her son, who struggles with inner conflict—torn between desire and morality, temptation and duty.