When their village is invaded by the grumpy Bergens, two mismatched friends must work together in perfect harmony to save the day. Featuring hit songs performed by Justin Timberlake, Anna Kendrick, and more.

When the eternally optimistic Poppy, queen of the Trolls, learns that the Bergens no longer have any holidays on their calendar, she enlists the help of Branch and the rest of the gang on the delightfully quirky mission to fix something that the Bergens don't think is broken.

Poppy discovers that Branch was once part of a boy band, BroZone, with his brothers: Floyd, John Dory, Spruce, and Clay. But when Floyd is kidnapped, Branch and Poppy embark on a journey to reunite the other brothers and rescue Floyd.

Poppy and Branch discover that they are but one of six different Trolls tribes scattered over six different lands and devoted to six different kinds of music: Funk, Country, Techno, Classical, Pop and Rock. A member of hard-rock royalty, Queen Barb, aided by her father King Thrash, wants to destroy all other kinds of music to let rock reign supreme. With the fate of the world at stake, Poppy and Branch set out to visit all the other lands to unify the Trolls in harmony against Queen Barb.

It is time to celebrate! 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 writers' block, trying to think of a Holiday rap for his dad, Guy Diamond. On the journey to get his flow back, Tiny Diamond 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?