One day, a letter suddenly arrived from her ex-husband, asking to meet their son. Reuniting with her former husband triggers a shift in the son's feelings toward his mother, turning into jealousy. Gradually, the mother finds her love for her son evolving into something beyond a parent's affection. Though deeply in love, neither can bring themselves to speak the truth—until the son finally confesses, "I love you, Mom!" Bound by blood yet drawn together by forbidden desire, they surrender to each other's touch. Amid inner conflict and overwhelming pleasure, the taboo barrier breaks as mother and son passionately crave and take each other in hot, intense sex.