After her husband's death, a lonely mother begins seducing her son. The two pursue pleasure together, endlessly craving deeper connection even after reaching satisfaction. One day, a visiting salesperson arrives to demonstrate a health device, using a vibrator to bring the mother to ecstasy. Witnessing this, the son declares, "I won't let her go," yet intensifies his relentless advances. Between mother and son, a complex relationship intertwines love and desire.