Based on true events, renowned mountaineer Hong-gil Um set out on a mission to Everest to retrieve his late junior climber's body and faces the greatest challenge of his life. Following a grueling climb up Kanchenjunga, Hong-gil and Mu-taek become fast friends and partners in climb. Years later, Hong-gil is a renowned lecturer and Mu-taek takes up an assignment to go up Everest. When Hong-gil learns that Mu-taek has gone missing, he decides to put together a rescue team to retrieve the body. Despite warnings, concerns over his injured leg and treacherous storms, Hong-gil leads the expedition.