After two films of true friendship and relentless flirting, Poppy and Branch are now officially, finally, a couple (#broppy)! As they grow closer, Poppy discovers that Branch has a secret past. He was once part of her favorite boyband phenomenon, BroZone, with his four brothers: Floyd, John Dory, Spruce and Clay. BroZone disbanded when Branch was still a baby, as did the family, and Branch hasn't seen his brothers since. But when Branch's bro Floyd is kidnapped for his musical talents by a pair of nefarious pop-star villains - Velvet and Veneer - Branch and Poppy embark on a harrowing and emotional journey to reunite the other brothers and rescue Floyd from a fate even worse than pop-culture obscurity.