Vikram and Aditya are back in magnificent Ladakh. Having finally freed their young friend Tsering from the hands of dangerous men, they’ve set themselves up for an even great challenge: to locate the the grey ghost of the Himalayas, the snow leopard. The boys join a team of ecologists and explorers in their search for this immensely rare and beautiful creature of the wild. But high up in the Himalayas, amidst daunting mountains and dark valleys, everyone has just one question on their mind: how do you study an animal you cannot find?