For the past year, Sandra, a German writer, her French husband Samuel, and their eleven-year-old son Daniel have lived a secluded life in a remote town in the French Alps. When Samuel is found dead in the snow below their chalet, the police question whether he committed suicide or was killed. Samuel's death is treated as suspicious, presumed murder, and Sandra becomes the main suspect. Little by little the trial becomes not just an investigation of the circumstances of Samuel's death, but an unsettling psychological journey into the depths of Sandra and Samuel's conflicted relationship.