As street demonstrations and political anger spill onto the streets of Paris in 1968, a different time flows in the darkness of apartment buildings. Bernardo Bertolucci captures that fragile moment of youth and limbo within the atmosphere of a closed room, detached from the uprisings in the outside world. In this love triangle set in France, a world where boundaries dissolve is created between the cinema-loving twins and Matthew, the foreign student who joins them. As the clamor of the street protests pounds against the windows, the minds and bodies inside slowly begin to write their own radical rules.