Robert Walton, an explorer, describes his trip to the Arctic in letters to his sister, Margaret Saville, who lives in England. After discussing his preparations for the trip, one of Walton's letters informs Margaret that his ship is stuck and surrounded by ice. Walton then relates a strange event: As they looked out on the enormous ice field, Walton and his crew saw a gigantic man being pulled by a dogsled. The following day they discovered another, smaller man, desperately ill, adrift on a sheet of ice. Walton writes that he brought the man onto his ship, allowed him to rest, and attempted to nurse him back to health. After a week the man was able to talk and told Walton an incredible story.