A young Belgian car nut and hairdresser's apprentice attempts to get a Porsche by all means for his nearing debut race and meets a girl in the same time.

Paul, a young idealist trying to figure out what he wants to do with his life, takes a job interviewing people for a marketing research firm. He moves in with aspiring pop singer Madeleine. Paul, however, is disillusioned by the growing commercialism in society, while Madeleine just wants to be successful. The story is told in a series of 15 unrelated vignettes.

Pierre Lachenay is a well-known publisher and lecturer, married with Franca and father of Sabine, around 10. He starts a love affair with air hostess Nicole, which Pierre is hiding, but he cannot stand staying away from her.

Love at Twenty unites five directors from five different countries to present their different perspectives on what love really is at the age of 20. The episodes are united with the score of Georges Delerue and still photos of Henri Cartier-Bresson.