Three years after Miguel Rivera risked everything to bring harmony back to his family, the teenager has been filling the streets of Santa Cecilia with his music. But on the eve of an important audition, Miguel's dreams are threatened when Ernesto de la Cruz - the fallen idol who won't stay forgotten - returns for a vengeful encore. Miguel travels back to the Land of the Dead to reclaim the one thing he cannot live without, and learns that this time it will take more than a song to save what matters most.