Victor is soon so captivated by natural philosophy that he neglects all other aspects of his life, including his family.

He rapidly advances, and after two years of intense labor he succeeds in uncovering the key to animating life.

The stranger, who the reader soon learns is Victor Frankenstein, begins his narration. He starts with his family background, birth, and early childhood, telling Walton about his father, Alphonse, and his mother, Caroline. Alphonse became Caroline’s protector when her father, Alphonse’s longtime friend Beaufort, died in poverty. They married two years later, and Victor was born soon after.

We are introduced to Robert Walton, a 28-year-old sea captain who is embarking on a journey to the North Pole region in order to find a passage from the Pacific to the Atlantic. He writes the letters to his sister, Mrs. Saville, in London, England. He has talked about making this expedition for six years: it has been a favorite dream of his, and he is pleased that he finally has a chance to make good on his promise to himself. Other dreams, such as becoming a poet or a playwright, have not worked out. Therefore, this vision must succeed. The writer of letters is thrilled that he will satisfy an "ardent curiosity" by setting foot on a part of the world never visited by man.

David muses on the state of affairs at the time of his writing. He sees Miss Betsey, old but still upright, accompanied by Peggotty, who is also old but still bright and happy. Mr. Dick is still working on his autobiography. Mrs. Steerforth and Miss Dartle argue as usual. Doctor Strong continues to work on his dictionary while he and Annie live in marital bliss. Traddles is a successful lawyer and happily married to Sophy, and Agnes is forever the light of David’s life.

Agnes and David remain friends. One day, when he can bear it no longer, David demands to know whom she loves more than anyone else. She sobs, and David realizes he is her true love. They are engaged and married within two weeks.

David receives a letter from Mr. Creakle, who has heard of David’s fame. Now a magistrate, Mr. Creakle asks David to come to his prison to witness his new form of punishment, which he says is the perfect way to reform prisoners. At the prison, David and Traddles are told of two prisoners who prove just how well Mr. Creakle’s system works. The first of the prisoners is Uriah, who is serving a life term in prison for defrauding the Bank of England. Uriah tells David, Traddles, and the guards that he wishes everyone could go to jail to improve their lives. The second prisoner is Littimer, who attempted to rob someone but was apprehended by Miss Mowcher, who recognized him in the street and stopped his getaway.

David returns to Miss Betsey’s, where Mr. Dick and Peggotty now live. David and his aunt talk through the night. He inquires whether Agnes has any lovers. Miss Betsey tells him that Agnes has many admirers but only one love—but she does not reveal the identity of Agnes’s love. The next day, David goes to visit Agnes. He tells her how much he reveres her, no matter what new ties she should choose to make in her life. Agnes seems troubled by his declarations of affection.

David travels abroad and eventually settles in Switzerland. He mourns the deaths of Dora, Steerforth, and Ham and begins to feel the weight of his sorrows for the first time. David receives a letter from Agnes and reflects how much he loves her. He resolves not to make any decisions about love or marriage until a full year has passed since Dora’s death. He decides to try to make himself a better man in the meantime.