Once a year, Abuelo comes from Mexico to visit his family. He brings his guitar, his music—-and his memories. In this story inspired by the life of Apolinar Navarrete Diaz—-author Angela Dominguez's grandfather and a successful mariachi musician—-Abuelo and his grandchildren sing through the bad times and the good. Lifting their voices and their spirits, they realize that true happiness comes from singing together.