When the Queen of the Trolls, Poppy, learns that the Bergens do not have holidays, she enlists her friends to help her bring holiday cheer to them.

In Trolls Holiday in Harmony, the Trolls are excitedly preparing for the holiday season in their colorful world. When Poppy discovers a long-lost invitation to a special gift exchange, she embarks on a journey to find the perfect present for her friend. Along the way, she encounters a brilliant inventor, a wise monk, and experiences a snow-filled adventure full of laughter and music. This heartwarming Christmas special celebrates friendship and the joy of giving.