Up in the star tower in the middle of the Atacama desert in Chile, astronomers from all over the world get together to stare up at the sky: here it is at its most clear. Archeologists are drawn to this place too: thanks to the extreme dryness relics from the past are conserved in excellent condition. But the same desert is also home to a dark chapter in Chile’s past: a concentration camp for political opponents of the Pinochet regime. A compelling documentary that uses astronomy and archeology to guide you through a hidden past.