During the summer of 1956, citizen Julio Riquelme Ramírez mysteriously disappeared during a trip on the mythical and disappeared north longitudinal train at a time when it was crossing the Atacama desert. Since then nothing has been heard of him until, exactly 43 years later, the discovery of his skeleton was made in the thickest part of the desert, 120 km south of Antofagasta. Ernesto Riquelme, son of the disappeared, is the one who assumes the discovery and the subsequent process, confronting the old myths that explained the disappearance of his father with the dry reality, in a story with great questions, deep family disagreements and an unusual witness to the events.