A young woman, Blanche (the lovely Emmanuelle Chaulet), works in the City Hall of a trendy New Town near Paris (somewhat to his discredit, Rohmer's films always occurs in middle class and upper middle class milieus, never in working class neighborhoods or in the immigrants building projects). Having recently arrived there, Blanche lives quite a lonely life, until she becomes friends with another young woman, Lea (Sophie Renoir), through which she met her boyfriend Fabien (Eric Viellard), and an acquaintance of the couple, Alexandre (François-Eric Gendron). Basically, the movie follows the time honored plot of exchange of relationships. A is with B, and C with D, but then A will start a liaison with D, which will make C jealous, and would start going with B in revenge and so forth. The title in French is a pun: the boyfriend of my friend would (could) become my boyfriend. Rohmer is known to be a political conservative, but here he is hardly a moralist, since he examines the sexual freedom of today's youth without condemning it. The movie is slow and talky, but these characters are believable and appealing (if somewhat shallow and a bit better looking than ordinary).