Poppy is planning a "secret gift swap" for all of Trolls Kingdom. When both Poppy and Branch end up drawing each other's name, things take an unexpected turn. Both are at a loss finding the perfect gift for the most important troll in their lives. Meanwhile, Tiny Diamond comes 'down with a bad case of writer's block while trying to think of a holiday rap for his dad, Guy Diamond. On the journey to get his flow back, Tiny will meet new friends that guide-him to look through the clutter. Will Poppy and Branch finally come up with the perfect gift idea for one another? DreamWorks Trolls Holiday in Harmony will light-up the holiday season with festive traditions, musical moments and heartfelt humour for audiences around the world!