Twenty years in the making, Urrea's epic novel recounts the true story of his great-aunt Teresita. In 1873, amid the political turbulence of General Porfirio Díaz's Mexican republic, Teresita is born to a fourteen-year-old Indian girl, "mounted and forgotten" by her white master. Don Tomàs Urrea later takes his illegitimate daughter into his home, where she learns to bathe every week and read "Las Hermanas Brontë." But Teresita also continues a folk education as a curandera, discovering healing powers and a mystical relationship with God. Indian pilgrims swarm to the Urrea ranch, where "St. Teresita," a mestiza Joan of Arc, kindles in them a powerful faith in God and a perilous hunger for revolution. The novel brings to life not only the deeply pious figure whom Díaz himself dubbed "the Most Dangerous Girl in Mexico" but also the blood-soaked landscape of pre-revolutionary Mexico.