kisah Buck, anjing berhati besar yang hidupnya berubah ketika dia tiba-tiba keluar dari rumahnya di California dan dipindahkan ke belantara Alaska Yukon,selama Gold Rush tahun 1890-an di tim kereta luncur anjing pengiriman surat dan kemudian ia memimpinnya , Buck menjalani petualangan syang sangat hebat dalam hidupnya hingga akhirnya Ia menemukan tempat sejatinya di dunia.

the story of Buck, a big-hearted dog whose blissful domestic life is turned upside down when he is suddenly uprooted from his California home and transplanted to the exotic wilds of the Alaskan Yukon during the Gold Rush of the 1890s. As the newest rookie on a mail delivery dog sled team--and later its leader--Buck experiences the adventure of a lifetime, ultimately finding his true place in the world and becoming his own master.