Josefine is tired of having birthday Christmas Eve - the same day as a certain Jesus - so she decides to move Christmas. It's harder than she thought, but she gets the help of a magic nativity play that sends her back til when Jesus was at her age. Josefine and Jesus become friends, but what happens to Josefine's classmate Oskar, who wants to be more than friends? And who is the mysterious Thorsen who owns the time machine? And what about Christmas, do they manage to move it?