It's another wonderful Christmas, and Barbie (voiced by Kelly Sheridan) is about to attend the Christmas charity ball with her sister Kelly (voiced by Amelia Henderson), but Kelly is in a bad mood. So, Barbie uses a snow globe to tell her sister a story that happened in the Victorian era. At that time, there was a beautiful and proud opera star, Yi Tian Starling (voiced by Morwenna Banks). She was very proud and hated Christmas and singing carols during the holidays. The troupe staff and actors got along very well, but everyone was afraid of the sharp and arrogant Yi Tian. Everyone originally planned to celebrate Christmas Eve, but Yi Tian asked everyone to stay and rehearse. No one could persuade her to change her mind. This high and mighty queen brought unhappiness to everyone with her arrogance. At this time, an accident happened to Yi Tian, which made her cold soul change a little...