Bernardo Bertolucci's film is a penetrating look at how youthful rebellion was determined to exact social and moral change during the revolutionary spring of 1968. When French twins Louis Garrel and Eva Green invite American fellow student Michael Pitt to stay at their parents' Paris apartment, they test each other's cinematic, emotional, sexual and political ideals to see how far they will go. The fact the trio are film fanatics enables Bertolucci to explore a cineaste edge to their passions, and the vintage film clips - from A Bout de Souffle and Blonde Venus to The Girl Can't Help It and Freaks - give the drama further stylish resonance. Pitt is wonderful as the sexually awakened naif who slowly comes to terms with Euro sophistication and the Blowin' in the Wind tenor of the times. Erotically explicit and unrestrained, this is a stunning return to form from the taboo-challenging director of Last Tango in Paris.

When Isabelle and Theo invite Matthew to stay with them, what begins as a casual friendship ripens into a sensual voyage of discovery and desire in which nothing is off limits and everything is possible.