In a series of letters, Robert Walton, the captain of a ship bound for the North Pole, recounts to his sister back in England the progress of his dangerous mission. Successful early on, the mission is soon interrupted by seas full of impassable ice. Trapped, Walton encounters Victor Frankenstein, who has been traveling by dog-drawn sledge across the ice and is weakened by the cold. Walton takes him aboard ship, helps nurse him back to health, and hears the fantastic tale of the monster that Frankenstein created.