The trolls are a happy-go-lucky group that are menaced by the miserable Bergens, who believe in order for them to be happy they must eat a troll. Unfortunately for the Bergens, the trolls have escaped.
After 20 years, (right when the happiest of all the trolls Princess Poppy (Anna Kendrick) is about to assume the throne from her father), the Bergens have finally tracked them down. Now it’s up to Poppy and pessimistic Branch (Justin Timberlake) to track them down and save the trolls. Along the way, many songs are sung and a new understanding of others is learned in this story that is both tune-filled and eye-popping in it’s cinema photography.