Curious about the work his mother has recently started at home, the son comes home early and opens the front door. When he enters the house, he is shocked to see his mother giving an erotic massage to a customer on a massage table. Excited by his mother's unusual, sensual appearance, the son can't stop thinking about her. His feelings for his mother grow stronger with each passing day, so he disguises himself and goes to his mother's massage parlor as a customer...