One of Londons most popular novels, the plot storyline follows a dog named Buck, who is a four year old 140lb Saint Bernard and Scotch Shepard mix. Buck is abducted from a comfortable life as a pet and tossed into the maelstrom of the Yukon Gold Rush and the brutal realities of frontier life. Buck changes hands a number of times before landing in the kindly hands of John Thornton, a brief respite before the storys final turn. The plot concerns a previously domesticated dog named Buck, whose primordial instincts return after a series of events leads to his serving as a sled dog in the Yukon during the 19th-century Klondike Gold Rush, in which sled dogs were bought at generous prices. Buck learns from his experiences and becomes an overall dominant (conquering), primordial (More like ancestors) beast (undomesticated).