Mexican musician Carmelo Muniz, a 60-year-old-father, and his musical partner, Arturio Arias, roam the streets of San Francisco playing love songs for tips at hipster dives and taquerias. They are a duo, but they call themselves a trio for marketing purposes. Carmelo's stay in San Francisco ends abruptly when he learns that his ailing mother has taken a turn for the worse. Upon his return to Mexico, Carmelo sees his family for the first time in many years, but almost as soon as he arrives, he realizes that he can't adequately support them. Without Arturo by his side, Carmelo finds himself working the mariachi circuit--weddings, quinceaneras, funerals. And when he and Arturo reunite, they work the Salvatierra bars together, playing love songs to prostitutes and their clients. But the pesos just don't add up to much. Carmelo has two young daughters, and his instincts as a father are fraught with ambivalence; nonetheless, he finds himself plotting a return trip back to the U.S.