Over the past year, Sandra, a German writer, her French husband Samuel, and their eleven-year-old visually impaired son, Daniel, have been living in a remote town in the French Alps. One day, Samuel is found dead in the snow below their chalet. The police question whether he committed suicide or was murdered. A suspicious death inquiry is opened. Sandra is quickly accused. A year later, Daniel attends his mother's trial, which gradually becomes not just an inquiry into the circumstances of the death, but an unsettling psychological journey into the depths of the troubled relationship between Sandra and Samuel.