Late one night, filmmaker Brad Bischoff sat down with his father-in-law, Roberto Olivera, for a couple of beers. Bischoff knew little about Olivera’s background, save for Olivera’s heritage as a Mexican immigrant. He decided to ask. “I remember being totally awestruck by his captivating story,” Bischoff told The Atlantic. “I wanted to capture the feeling I felt and share it.” The result is Field Song, a meditative short film in which Olivera shares his hard-won life lessons over images of the tomato fields in which he toiled with other migrant workers.