Just as the disheveled and alcoholic filmmaker Ismaël embarks on a difficult new film project, his life is sent into a tailspin. His wife Carlotta, presumed dead for 20 years, come crashing back into his life creating chaos in his work and his current romantic relationship with the starry-eyed astronomer Sylvia.

A wayward young man finds himself involved with two mysterious people of a previous generation. After an affair with the married Hélène, the young man tries to escape her obsessions on a road trip with Serge, a taciturn relic of the 60s.