French avant-garde novelist Alain Robbe-Grillet, who previously wrote the screenplay for the ground-breaking L'Annee Derniere a Marienbad, made his directorial debut with this allegorical drama. A man known as N (Jacques Doniol-Valcroze) encounters L (Francoise Brion), a mysterious woman who may or may not be involved with M (Guido Celano), a Turk who kidnaps women and forces them into prostitution. N finds himself falling in love with L, who suddenly disappears. When she reemerges, N persuades L to join him for a vacation; as they drive out of town, one of her dogs dashes into the road. Swerving in a desperate effort to save the dog, N loses control of the car and L is killed. N becomes obsessed with the accident, for which he cannot forgive himself. L'Immortelle was nominated for the Golden Bear award at the 1963 Berlin Film Festival.
by Mark Deming synopsis