Coco

In the Mexican town of Santa Cecilia, a young woman named Imelda marries a man who eventually leaves her and their daughter Coco to pursue a music career. When he never returns, Imelda bans music from her family and opens a shoemaking business.
Decades later, Imelda's great-great-grandson Miguel lives in the family home with his parents and relatives, including an elderly and ailing Coco. Despite the family's continued ban on music, Miguel secretly loves it and teaches himself to play guitar by watching the VHS documentary of his idol, the late musician Ernesto de la Cruz. On the Day of the Dead, Miguel inadvertently bumps the family ofrenda and breaks a frame containing a photo of Imelda and an infant Coco. He discovers a hidden section of the photograph that shows his great-great-grandfather, whose head has been torn from the photo, holding Ernesto's famous guitar. Believing this proves Ernesto is his relative, Miguel excitedly tells his family about his musical aspirations. In response, Miguel's grandmother, Elena, destroys his guitar, causing him to shun his family.
Miguel breaks into Ernesto's mausoleum and takes his guitar to use in a local talent competition. Once Miguel strums it, he becomes invisible to all living people. However, he can interact with his skeletal dead relatives, who are visiting from the Land of the Dead for the holiday. Taking him back with them, they realize Imelda cannot visit since Miguel removed her photo from the ofrenda. Miguel also discovers that he has been cursed for stealing from the dead: he must receive a family blessing to return to the living world before sunrise or he will remain in the Land of the Dead forever. Imelda offers him a blessing on the condition that he abandons music, but Miguel refuses and seeks Ernesto's blessing instead.
Miguel encounters Héctor, a down-on-his-luck skeleton who once performed with Ernesto. Héctor offers to bring Miguel to Ernesto in exchange for Miguel placing his photo on an ofrenda so he can visit his daughter before she forgets him, which would cause him to fade from existence. Héctor helps Miguel perform in a talent competition to win entry to Ernesto's mansion, but Miguel flees after being discovered by his family.
Miguel sneaks into Ernesto's mansion and is welcomed by a surprised Ernesto, but Héctor appears and accuses Ernesto of stealing his songs. As the two argue, Miguel slowly pieces together the truth: Ernesto and Héctor were once a musical act on the brink of fame until Héctor grew homesick and tried to leave. Unable to write songs himself, Ernesto poisoned Héctor and stole his guitar and songs to pass off as his own. To protect his legacy, Ernesto seizes Héctor's photo and has Miguel and Héctor thrown into a cenote pit. There, Héctor reveals that his daughter is named Coco, thus making him Miguel's actual great-great-grandfather.
After being rescued by his family, Miguel reveals the truth about Héctor's death, and Imelda, though she is angry at Héctor, agrees to help him. The family infiltrates Ernesto's concert to retrieve Héctor's photo. Ernesto's crimes are exposed to the audience, who quickly turn on him, and he is crushed by a falling bell, mirroring his fate in real life, although Héctor's photograph is lost in the chaos. As the sun rises, Imelda and a fading Héctor unconditionally bless Miguel and return him to the living world. Back home, Miguel plays "Remember Me" on Héctor's guitar, brightening Coco to sing with him. She shares that she kept the torn piece of the photo with Héctor's face, then tells her family stories about her father, preserving his memory and existence in the Land of the Dead. Miguel reconciles with his family and their ban on music is finally lifted.
One year later, Miguel shows his new baby sister the family ofrenda, now displaying photos of Héctor and a recently deceased Coco, while Coco's collected letters from Héctor prove Ernesto's theft of his songs, leading to Ernesto's disgrace and Héctor's rightful recognition. In the Land of the Dead, Héctor joins Imelda, Coco, and their family to visit the living world. Miguel performs a heartfelt song for both his living and dead relatives.