Madeleine (Monique Mercure), 72, decides that she will not impose the misery of her illness on those dear to her and that she will not outlive her own conscience. Too proud to support her degeneration, loving her children and friends too much to require them to take care of her during this terrible ordeal, she plans to end her life. Beforehand, she wants to undertake a little farewell tour, see her loved ones again and savor one last time some landscapes that particularly touched her. She then hires Zoé, (Suzanne Clément), as a driver, a 35-year-old musician she met by chance and who seems to be going through a difficult period.
La Brunante recounts the great trip that these two women will take from Montreal to Percé. The film explores the initiatory path on which Madeleine and Zoé embark without their knowledge. Because the progression of Madeleine's illness as well as the trip will force their intimacy. This intimacy in return will lead to shocking revelations for both. They will learn from each other to see things from a different perspective and will change their perceptions of love and what constitutes their reason for living. La Brumante offers an emotional, psychological and ultimately spiritual adventure with the fundamental objective of questioning the mystery of life and praising its splendor.