The film also stars Jean-Nicolas Verreault as Marc Vandal, a local pilot whose wife's recent death in a plane crash may be central to the tidal mystery; Julie Gayet as Catherine Rolland, Alice's lesbian friend from college who helps her investigate; and Geneviève Bujold as Colette Lasalle, the owner of the local diner who is convinced that the mystery has a supernatural explanation. Other supporting cast members include Vincent Bilodeau, Gabriel Arcand and Jean-Pierre Ronfard.
