This compact documentary was shot in the mountain ranges of Urique, Chihuahua in Mexico where Lorena Ramirez and her family live. It contains beautiful cinematography and gives viewers an insight into the life of the Ramirez family who are an indigenous people belonging to a group called the Rarámuri (or Tarahumara). The Ramirez family live an isolated existence without any of the modern-day comforts, where the sons attend a school that is a five-hour walk away whilst Lorena and her sisters remain at home to tend to their animals and prepare meals which requires a long four-hour journey by foot to the nearest grocery store.

Like her father, Santiago, who has won the Guachochi Ultramarathons three times, Lorena discovers that she has a talent for running. Dressed in her traditional skirts and sandals, Lorena wins many races and fans along the way. Having grown up in a land untouched by development, the fresh air that is free from factory smoke and the rugged dirt paths across the mountainous terrain means that Lorena was born to run marathons.

Just like the fireflies that follow their lights in silence, the softly spoken Lorena whispers that she will continue to follow her light to run races for as long as she can. Overall, it was a unique, anthropology documentary film which makes you want to move to the mountains and take up running.