The Norwegian documentary The Mystery Package premieres in national cinemas tomorrow.

Every Christmas for the past 22 years, an anonymous package has arrived on the doorstep of Inger and Arne Sandnes in Valldal, Norway. It’s filled with gifts for the entire family, along with the same handwritten note: "Merry Christmas from all of us in Arendal." Despite years of family investigation, media coverage, and wild speculations, the sender has never been identified. Until now.