A group of animals waiting for the annual flood they rely on for food and water discover that the humans, who have been destroying their habitats have built a dam for a leisure resort. The animals endeavour to save the delta and send a message to the humans not to interfere with nature.
Mr. Hoppy is a shy old man who lives alone in an apartment building. For many years, he has been secretly in love with Mrs. Silver, a woman who lives below him. Mr. Hoppy frequently leans over his balcony and exchanges polite conversation with Mrs. Silver, but he is too shy to disclose how he feels. Mr. Hoppy longs to express his feelings to Mrs. Silver, but he can never bring his lips to form the words. Mrs. Silver has a small pet tortoise, Alfie, whom she loves very much. One morning, Mrs. Silver mentions to Mr. Hoppy that even though she has had Alfie for many years, her pet has only grown a tiny bit and has gained only 3 ounces in weight. She confesses that she wishes she knew of some way to make her little Alfie grown into a larger, more dignified tortoise. Mr. Hoppy suddenly thinks of a way to give Mrs. Silver her wish and win her affection.
Queen Poppy and Branch make a surprising discovery — there are other Troll worlds beyond their own, and their distinct differences create big clashes between these various tribes. When a mysterious threat puts all of the Trolls across the land in danger, Poppy, Branch, and their band of friends must embark on an epic quest to create harmony among the feuding Trolls to unite them against certain doom.
When the eternally optimistic Poppy, queen of the Trolls, learns that the Bergens no longer have any holidays on their calendar, she enlists the help of Branch and the rest of the gang on a delightfully quirky mission to fix something that the Bergens don't think is broken.