Saruul is one of the few remaining Tsaatan (reindeer people) living in the Mongolian taiga near the Siberian border. Leading a nomadic life, the Tsaatan move their camp every two to three weeks so the reindeer can have fresh moss and grass. Every night, Saruul hops on a reindeer's back and rides into the valley to help round up the rest of the herd. She started riding when she was only four. If the reindeer aren't brought back to the camp to be milked every night, they will turn completely wild within a few weeks. (Tsaatan)