After the Bergens invade Troll Village, Poppy, the happiest Troll ever born, and the curmudgeonly Branch set off on a journey to rescue her friends.
Poppy discovers that Branch was once part of the boy band 'BroZone' with his brothers, Floyd, John Dory, Spruce and Clay. When Floyd is kidnapped, Branch and Poppy embark on a journey to reunite his two other brothers and rescue Floyd.
Following their win at the world championship, the now separated Bellas reunite for one last singing competition at an overseas USO tour, but face a group who uses both instruments and voices.