Buck is a large, grumpy St. Bernard and Scottish Shepherd. He lives with Judge Miller's family in Santa Clara, California. Unfortunately, Buck was kidnapped and sold out and became a slave dog.
Later, Buck became a member of Perot'sdog sled team. Perot is a gentle postman. His job is to deliver on the Yukon tundra, which is covered in ice and snow and the natural environment is harsh. letter. Buck quickly integrated into the dog team, and gradually became the leader of the dogs, but the appearance of the telegraph system made Perot's work obsolete.
Later, Buck met a series of new owners, including the cruel miner Hal, and the good-natured John Thornton. Buck likes John very much. As John's journey continues, Buck, who was originally highly domesticated, finds that he gradually reveals the animal nature, and more and more shows the nature of animal impulse, and is driven by it
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