This time Koala Buster Moon wants to present the most extravagant and dazzling stage show ever seen. But big dreams and spectacular hits also call for a bigger stage than the Moon Theater. The Crystal Tower Theater in the glamorous big city would be perfect - but there's one small problem. Actually, three. First, Buster Moon, mother pig Rosita, rocker porcupine Ash, elephant Meena, gorilla Johnny and pop provocateur, pig Gunter, must somehow make it to the office of music mogul Jimmy Crystal and convince the unscrupulous wolf to let them use his theater. It's a hopeless endeavor until Gunter spontaneously promises him the scoop: rock legend Clay Calloway (Bono) will return to the stage for this show! The problem: Buster has never met Clay, a lion who has retired from show business! While Moon's all-star ensemble works to put on the spectacular show, the koala sets out to find Clay. What begins as a dream of great success becomes an emotional reminder of the healing power of music.