Claude, a bookstore owner, sees that his personal life, just as his struggling business, is failing. Claude is trapped in a loveless marriage to Isabelle (Juliet Berto), who does not seem to possess any sexual attraction to her husband or affection for her children. The only activity Isabelle does seem to relish is shopping, which means spending Claude's hard-earned income. Then salvation arrives in the form of a business brainstorm. Claude transforms the bookstore into a sex shop, selling everything from leather bondage paraphernalia to pornography; soon business takes off. The proprietorship of the sex shop and his friendship with a sexually uninhibited customer, Jacqueline (Nathalie Delon), open up new possibilities for Claude, and he realizes that he's been repressed. Although he encourages Isabelle to join him in his new erotic adventures, she is at first reluctant to embrace the swinging lifestyle; the couple's attempts at a ménage à trois are disastrous.
Source : allmovie.com