Set in the remote mountains of China and Tibet, this film follows the perilous existence of a female snow leopard and her two young, who are less than a year old, in a valley of stunning beauty with a dazzling diversity of wildlife. Two photographer brothers came upon this lost valley in 2016 and were amazed to find it home to a dense population of snow leopards in a relatively small territory. Their discovery led to this exceptional film about an elusive big cat that is rarely caught on camera.