L'Avventura (1960)
Claudia and Anna join Anna's lover, Sandro, on a boat trip to a remote volcanic island. When Anna goes missing, a search is launched. In the meantime, Sandro and Claudia become involved in a romance despite Anna's disappearance, though the relationship suffers from guilt and tension.
Directed by: Michelangelo Antonioni
Starring: Gabriele Ferzetti, Monica Vitti, Lea Massari, Dominique Blanchar, Renzo Ricci, James Addams
Links: IMDb, Movie posters, Movie stills