Hitomi is relentlessly pursued by her son's friend, Noboru, who has come to stay the night, and ends up giving in to his desire. Hitomi is tormented by feelings of immorality towards her son, but since her husband passed away, she can no longer suppress the lust of a woman she had forgotten. However, Noboru is not the only one who has his sights on Hitomi. Junichi, who found out about their love affair, joins in, and the immoral act becomes even more intense...