Miguel eventually meets Ernesto, but Héctor arrives and reveals the dark truth: Héctor and Ernesto were once partners. When Héctor decided to return home to his family, Ernesto him and stole his songs and guitar to become famous.
Miguel also realizes that , not Ernesto. Héctor is the one who wrote "Remember Me" for his daughter, Coco. The Resolution
The movie (2017) follows the story of Miguel Rivera , a 12-year-old boy living in a small Mexican village who dreams of becoming a famous musician like his idol, Ernesto de la Cruz . The Family Ban on Music