Trolls 4: Harmony Unleashed takes the Trolls on their most epic and vibrant adventure yet, delving deeper into the power of music and unity as new challenges and discoveries shake up their colorful world.

The story begins as Poppy (Anna Kendrick) and Branch (Justin Timberlake), now co-leaders of the unified Troll tribes, are working to ensure that all musical genres continue to coexist in harmony. However, their peaceful efforts are interrupted when the Trolls discover a lost ancient melody—a song rumored to possess the power to reshape the world of music forever.

The melody is linked to a mysterious group of Harmony Trolls, an ancient tribe that disappeared centuries ago. Their leader, Melodia (voiced by Zendaya), emerges from hiding, warning Poppy and Branch about the dangers of unearthing the full power of melody. Meanwhile, Rhythmix (voiced by Lin-Manuel Miranda), a mischievous and charismatic troll, believes melody can be used to create a new musical order, free of rules.

As the trolls embark on a journey through new lands—including neon-lit techno forests, jazz-infused swamps, and boulder-strewn mountain ranges—they must face musical challenges, exciting mash-ups, and rivalries. Poppy and Branch’s relationship is tested as they grapple with their differing views on how to handle the ancient melody, while their friends, including Biggie (James Corden), Barb (Rachel Bloom), and Tiny Diamond (Kenan Thompson), provide comic relief and surprising moments of wisdom.

The film’s climax features a spectacular Harmony Festival, where the Trolls must unite all musical genres to prevent Rhythmix from misusing the power of melody. Through collaboration, creativity, and the understanding that everyone’s voice matters, the Trolls prove that harmony isn’t about conformity, but rather about celebrating differences.
With stunning visuals, catchy new songs written by Lin-Manuel Miranda and Justin Timberlake, and a heartfelt message about the power of music to connect people, Trolls 4: Harmony Unleashed delivers a fun, vibrant, and emotional experience that viewers of all ages will enjoy.