Eight years ago, Shoko abandoned her family and ran away with a man. Her son, Satoshi, felt anger along with dark desires about the matter. 'The suffering I've endured for these eight years... now it's mom's turn to taste it.' Satoshi ties up Shoko and harasses her. The taboo sexual intercourse between mother and son escalates day by day. Meanwhile, her husband Kouchiro, who couldn't forgive his wife and couldn't bring himself to touch her, sees Shoko tied up and moaning in pleasure, and shouts, 'Just how much do you two plan on making a fool out of me!'
