Poppy (Anna Kendrick) and Branch (Justin Timberlake) discover that they are but one of six different Troll tribes scattered over six different lands and devoted to six different kinds of music: Funk, Country, Techno, Classical, Pop and Rock. Their world is about to get a lot bigger and a whole lot louder.
Siobhán's a marine biology student who prefers spending her days alone in a lab. She has to endure a week on a ragged fishing trawler, where she's miserably at odds with the close-knit crew. But out in the deep Atlantic, an unfathomable life form ensnares the boat.