Poppy and Branch discover that there are but one of six different Troll tribes scattered over six different lands 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 by collecting all six strings that create different music. With the fate of the world at stake, Poppy and Branch, along with their friends Biggie, Satin & Chenille, Cooper, Smidge, Guy Diamond & his newborn son Tiny Diamond, and newcomer Legsly set out to visit all the other lands to unify the Trolls in harmony against Barb, who's looking to upstage them all.
After the banished chef of Bergens captures Trolls during a celebrassion, princess poppy, branch and willow set out on a mission to reduce their friends
The trio are back as they embark on another journey to stop queen barb from gathering all the strings to destroy all other genres of music and bringing then under her rule.
After the events of uniting all the different tribes of trolls, a new adventure begins for our three trolls when a bergan wedding is interrupted by a troll neither branch nor willow ever thought they'd would ever see again