一股新黑暗势力威胁到小马谷，六位小伙伴紫悦、苹果嘉儿、云宝、碧琪、柔柔和珍奇离开小马国踏上难忘之旅，在旅途中他们结交新朋友，遇到刺激的挑战，必须通过友谊的魔力拯救自己的家园。

热爱音乐的米格尔（安东尼·冈萨雷兹 Anthony Gonzalez 配音）不幸地出生在一个视音乐为洪水猛兽的大家庭之中，一家人只盼着米格尔快快长大，好继承家里传承了数代的制鞋产业。一年一度的亡灵节即将来临，每逢这一天，去世的亲人们的魂魄便可凭借着摆在祭坛上的照片返回现世和生者团圆。
在一场意外中，米格尔竟然穿越到了亡灵国度之中，在太阳升起之前，他必须得到一位亲人的祝福，否则就将会永远地留在这个世界里。米格尔决定去寻找已故的歌神德拉库斯（本杰明·布拉特 Benjamin Bratt 配音），因为他很有可能就是自己的祖父。途中，米格尔邂逅了落魄乐手埃克托（盖尔·加西亚·贝纳尔 Gael García Bernal 配音），也渐渐发现了德拉库斯隐藏已久的秘密。

How Music Works is David Byrne’s remarkable and buoyant celebration of a subject he has spent a lifetime thinking about. In it he explores how profoundly music is shaped by its time and place, and he explains how the advent of recording technology in the twentieth century forever changed our relationship to playing, performing, and listening to music.

Acting as historian and anthropologist, raconteur and social scientist, he searches for patterns—and shows how those patterns have affected his own work over the years with Talking Heads and his many collaborators, from Brian Eno to Caetano Veloso. Byrne sees music as part of a larger, almost Darwinian pattern of adaptations and responses to its cultural and physical context. His range is panoptic, taking us from Wagnerian opera houses to African villages, from his earliest high school reel-to-reel recordings to his latest work in a home music studio (and all the big studios in between).

Touching on the joy, the physics, and even the business of making music, How Music Works is a brainy, irresistible adventure and an impassioned argument about music’s liberating, life-affirming power.