一个年轻的蒙古人与旗主的女儿私定终身，旗主知道后暴怒。于是以将女儿许配给他为诱饵设下圈套，嫁祸之后又将他卖作奴隶。他逃出生天后回来复仇，为生存和正义而战，却无意中得知旗主女儿的孩子是自己的……

Tulgaa returns to his native village to care for his dying stepfather, honouring his remaining commitments by offering to lend a hand with the summer harvest. But upon witnessing Tulgaa’s clumsy first attempts, Tuntuulei, a sassy 10-year-old boy, takes it upon himself to school the city slicker on the grassland ways. Despite getting off on the wrong foot, the two soon find common ground and form a delicate bond that will transform their lives.