Once popular in school, a man grows into a lonely, unremarkable bachelor as his friends marry and drift away. One day he is approached by an alluring woman he barely recognizes: Rio, the plain, small-chested childhood friend who confessed to him ten years earlier, now a beautiful, voluptuous married woman. That night, after fleeing her emotionally abusive husband with nowhere else to go, Rio arrives at his home—and his old opportunity returns in irresistible form.