Glaciologist Phuntsho Tshering’s daughter, Yangchen, harbours a childhood fear that her father’s presence on the mountains of Bhutan might anger the mythical Snow Lion, the guardian spirit of these peaks. The deeply religious country of Bhutan prohibits mountaineering as the summits are considered sacred according to local traditions. Tshering is Bhutan’s sole sanctioned climber who leads his team on month-long journeys high in the sacred mountains to study remote glaciers and lakes.