Arsène Muselier returns to his home village at the end of the First World War. His only injury is a head wound, which sometimes provokes periods of delirium and fury. As he renews his acquaintance with the people he left behind - his mother, the old farmhand who brought him up after his father's death, his former girlfriend, and many others - he becomes fascinated by the legend of La Vouivre, a creature with the body of a woman who lives in the marsh, surrounded by vipers. One day, Arsène sees the strange woman - she is naked, beautiful, alluring, and he is instantly enchanted by her. Can she be real, or is she merely a creation of his damaged mind...?

Jean Carmet
as Requiem

Suzanne Flon
as Louise Muselier

Lambert Wilson
as Arsène Muselier

Jacques Dufilho
as Urbain

Macha Méril
as La rodinet

Laurence Treil
as La vouivre

François Tixier
as Angèle

Anne-Marie Pisani
as Emilie

Kathy Kriegel
as (as Kathie Kriegel)

Jean-Jacques Moreau
as Victor