Ugly Little Monkeys is a compelling documentary that brings to life the remarkable journey of Los Changuitos Feos de Tucson, the pioneering youth mariachi group in the United States. Inspired by Wilfred Arvizu's captivating book, this film delves into the heart of Tucson, Arizona, where the band was formed in the 1960s under the guidance of an unlikely mentor, Father Charles Rourke, an Irish priest with a deep passion for mariachi music.