The theatre world is a familiar setting for the films of Rivette. In Va savoir, the characters, all quick-witted, well-read and cultured types, revolve around each other in a delightful potpourri of theatre, romance and theft. In the end, everything lands on its feet and they all get the partner they deserve, but before then, long filmer Rivette takes two and a half hours to dwell lightly on the vicissitudes around the six protagonists. Camille is an actress with an Italian company that is in Paris to perform a play by Pirandello, Come tu mi vuoi. Her boyfriend Ugo is the director and the company's most important actor. Both have a hidden agenda for their trip to Paris: Camille meets her ex Pierre, a professor of philosophy, while Ugo is secretly researching a supposedly lost play by Goldoni. In the archives, he is assisted by the charming student Do, who steals his heart. In turn, Do has a link with Pierre: her stepbrother, the playwright Arthur, namely steals an expensive ring from Pierre's wife Sonia. After many sophisticated conversations, secret rendezvous and references to Pirandello, events reach a hilarious climax when Pierre and Ugo challenge each other to an old-fashioned duel for life and death.
—Anonymous