Watch MoviestoWatch. The Sonidero movement echoes throughout the streets of Mexico City with waves of tropical rhythms, neon lights and dance moves. Two brave and touching characters, La Cigarrita and El Duende fight to keep this tradition alive, opposing the government’s initiative to gentrify their neighborhoods. During the festivities that celebrate la Virgen de la Merced (The Virgin of Mercy) -one of the city’s most popular events- sonideros face a wall of anti-riot police.