The summary of Frankenstein by Mary Shelly

An English explorer, Robert Walton, is on an expedition to the North Pole. In letters to his sister Margaret Saville, he keeps his family informed of his situation and tells about the difficult conditions on the ship. One day when the ship is completely surrounded by ice, a man in bad condition is taken aboard: Victor Frankenstein. As soon as his health allows it, he tells Walton the story of his life. He grew up …

…eventually deteriorates and he dies. Just after his death, Walton finds the monster hanging over Victor's body. The demon speaks of his sufferings. Because of all the murders he has committed, he now hates himself. Since his creator is dead, he decides it is time that he too will rest in death. After stating that he will build a funeral pile for himself, he leaves the ship and disappears on his ice-raft in the darkness.