Monique was one of the UK's best made sex films and centers on a typical suburban couple, Bill and Jean, who engage Monique, a French au pair, to look after their two children, little dreaming of the shattering effect she will have on their lives, and their sex lives in particular. Bill finds himself strongly attracted to the totally uninhibited and desirable French girl and succumbs to temptation. His wife is also attracted to the French girl and slowly the three of them begin an unusual and satisfying ménage à trois.