Anyone else in his place would have given up, but not him. Just a month after narrowly surviving being hit by a car, high-altitude mountaineer and research-zoologist Boyan Petrov starts his recovery and long preparation to continue his dream: climbing all the fourteen 8.000-meter peaks, without supplementary oxygen. A three-times cancer survivor, he has climbed 10 of the 14 eight-thousanders, now it's time for the world’s giant: Everest. For this purpose, Boyan starts his journey by “warming-up” with the lowest peak among them, the so-called "dwarf" Shishapangma, number 11 on his bucket list. But an unexpected twist of fate leads to his disappearance a few meters under the peak, which activates an unprecedented interstate rescue mission and helicopter searches between the countries of Nepal, China and Bulgaria.