When Branch's musical brother, Floyd, is snatched by two malevolent pop-star villains, Branch and Poppy set out on an adventurous and heartfelt quest. Their mission: to gather Floyd’s fellow brothers and save him from a grim fate worse than fading into pop-culture obscurity. Along the way, they encounter challenges that test their bonds and musical talents, revealing the true power of family and friendship in the face of adversity.