Two days before Christmas 88-year-old Gertrud disappears without a trace from her apartment in Visby. The town is covered in snow and the temperature is decreasing. Despite great search efforts, she is nowhere to be found. When Maria Wern investigates the case, she learns that Gertrud's husband recently passed away and she fears that Gertrud is depressed or confused. But new clues surface that makes Maria try another theory in the search for the missing woman.