Plot: The Trolls are small creatures who live in an almost perpetual state of happiness, singing, dancing and hugging all day. However, they are discovered by the Bergens, large miserable creatures, who can feel happy only after eating a Troll. The Bergens imprison the trolls and eat them every year on a special occasion, called Trollstice. The Trolls, led by their king, King Peppy, with his baby daughter, Princess Poppy, escape through underground tunnels on the day of Trollstice, when Prince Gristle Jr. was going to eat his first Troll. Enraged, Gristle Jr.'s father King Gristle Sr. banishes his Chef who was in charge of the Trollstice preparation. 20 years later, (at the age of 20) Poppy throws a big party to celebrate the Trolls' escape, despite the fears and warnings of the gray troll, Branch, that loud parties will attract the Bergens. A Zen troll named Creek, who is Poppy's boyfriend, arrives and tells Branch to start being happy instead of being grumpy; Branch refuses. At the party, Branch's fears come true, when Chef sees the fireworks and kidnaps Guy Diamond, Biggie with Mr. Dinkles, Fuzzbert, Smidge, Satin with Chenille, D.J. Suki, Cooper, and Creek (which Poppy tried to rescue). Chef then takes the kidnapped Trolls back to Bergen Town, while secretly plotting to overthrow its monarchy in revenge for her banishment..
Alternative Plot: After the Bergens invade Troll Village, Poppy (Anna Kendrick), the happiest Troll ever born, and the overly-cautious, curmudgeonly Branch (Justin Timberlake) set off on a journey to rescue her friends. Their mission is full of adventure and mishaps, as this mismatched duo try to tolerate each other long enough to get the job done.