By the end of the 1920s, the flight route between Buenos Aires and Santiago de Chile is known as the most beautiful yet also the most dangerous in the world. Only the most experienced pilots dare to cross the Andes mountain range. Henri Guillaumet is one of these daring adventurers. Originally a military pilot, he must undergo extensive technical training before finally being hired as an airmail pilot by Aeropostal. On a beautiful June morning in 1930, he takes off from the Argentine airbase Colina and encounters a thick layer of clouds over the peaks of the Andes, forcing him to climb higher and higher. Due to a technical failure, he is forced to make an emergency landing in the snow-covered mountains with his Potez 25. He then embarks on an adventurous and risky trek through the Andes. Meanwhile, Guillaumet's restless colleagues are trying to...