Buster Moon and his friends must persuade reclusive rock star Clay Calloway to join them for the opening of a new show.
With his theatrical company a local success, Buster Moon is dreaming of bigger things. Unfortunately, when a talent scout dismisses their work as inadequate for the big time, Buster is driven to prove her wrong. With that goal in mind, Buster inspires his players to gamble everything to sneak into a talent audition in Redshore City for the demanding entertainment mogul Jimmy Crystal. Against the odds, they catch his interest with some frantic creative improvisation and even more desperate lies like personally knowing the reclusive rock star, Clay Calloway, who has not been seen in 15 years. Now faced with a tight production window with only a vague story idea and dire consequences for failure, Buster and his friends must all stretch their talents put on a show against all odds. In that struggle, the gang's challenges seem insurmountable, but each of them finds new inspirations and friends where they least expect them to pursue an artistic dream worthy of them.
Having saved his theatre after the unexpected success of the singing competition in , genius, ever-optimistic impresario Buster Moon gets ready for an even more intriguing challenge. Supported by the motley crew of his loyal all-star performers, Buster has set his sights on taking dazzling Redshore City by storm with an out-of-this-world theatrical extravaganza at infamous billionaire Jimmy Crystal's Crystal Tower Theatre. However, there's a catch. To conquer the glamorous entertainment capital of the world, Moon will have to find and talk reclusive global rock icon Clay Calloway into joining them. But can music mend a broken heart? Above all, is Buster's team destined for grandeur?