Yuka is a beautiful mature mother of two hardworking sons. One morning, her younger son begins acting strangely, showing coldness toward her. When she pleads for even a little kindness, his unresponsive hands gradually wander to forbidden places. Meanwhile, Yuka gives a massage to her exhausted eldest son to soothe his tired body. As she feels his physical reaction to her touch, long-forgotten feminine desires begin to stir within her once again.